JP3205211B2 - Method for producing monoiodo-substituted 9,9-dialkylfluorene - Google Patents

Method for producing monoiodo-substituted 9,9-dialkylfluorene

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Publication number
JP3205211B2
JP3205211B2 JP08797295A JP8797295A JP3205211B2 JP 3205211 B2 JP3205211 B2 JP 3205211B2 JP 08797295 A JP08797295 A JP 08797295A JP 8797295 A JP8797295 A JP 8797295A JP 3205211 B2 JP3205211 B2 JP 3205211B2
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JP
Japan
Prior art keywords
substituted
monoiodo
dialkylfluorene
distillation
producing
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JP08797295A
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JPH08283184A (en
Inventor
康浩 抜井
尚登 伊藤
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Mitsui Chemicals Inc
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Mitsui Chemicals Inc
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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、染料、医薬、高分子モ
ノマーなどの中間体として重要なモノヨード置換9,9
−ジアルキルフルオレンの製造方法に関する。
The present invention relates to a monoiodo-substituted 9,9 compound which is important as an intermediate for dyes, drugs, high molecular monomers and the like.
A method for producing dialkylfluorene.

【0002】[0002]

【従来の技術】従来、ビフェニルのヨウ素化は、ヨウ素
と各種酸化剤を用いる方法が知られており、例えば酸化
剤として過酸化水素を用いるもの(特開昭63−104
942号公報)、過マンガン酸カリウムを用いるもの
(Khim.Khim.Tekhnol Geol,
3rd. 67−9,1980)、過ヨウ素酸を用いる
もの(特開昭62−12728号公報)、酸素を用いる
もの(米国特許第 4792642号)等がある。
2. Description of the Related Art Hitherto, for the iodination of biphenyl, a method using iodine and various oxidizing agents is known. For example, a method using hydrogen peroxide as an oxidizing agent (Japanese Patent Laid-Open No. 63-104)
942), and those using potassium permanganate (Khim. Khim. Tekhnol Geol,
3rd. 67-9, 1980), those using periodic acid (JP-A-62-12728), those using oxygen (U.S. Pat. No. 4,792,642), and the like.

【0003】また、他のヨウ素化方法としてベンジルト
リメチルアンモニウムクロライドと塩化ヨウ素から生成
される化合物を用いた例(Chem.Lett., 6
2,439, 1989)等が知られている。
As another iodination method, an example using a compound produced from benzyltrimethylammonium chloride and iodine chloride (Chem. Lett., 6).
2,439, 1989).

【0004】しかしながら、上記のいずれの手法におい
ても、モノ及びジヨード置換体の反応選択性は乏しく、
置換するハロゲンの個数制御は困難である。これは、ジ
アルキルフルオレンのヨウ素化に対しても同様の結果で
あった。
However, in any of the above methods, the reaction selectivity of mono- and diiodo-substituted products is poor,
It is difficult to control the number of halogens to be substituted. This was a similar result for the iodination of dialkylfluorene.

【0005】一方、塩化ヨウ素を用いる方法(特開平0
4−224525号公報)においては、塩化ヨウ素の添
加量、並びに反応温度をコントロールすることにより、
比較的容易にモノ及びジヨード置換体の制御が可能であ
る。加えて、この方法は、酸化剤を必要としない為、安
全性の面からも有利であると考えられる。
On the other hand, a method using iodine chloride (Japanese Unexamined Patent Publication No.
In JP-A-4-224525), by controlling the amount of iodine chloride added and the reaction temperature,
It is relatively easy to control mono- and diiodo-substituted products. In addition, since this method does not require an oxidizing agent, it is considered to be advantageous in terms of safety.

【0006】[0006]

【発明が解決しようとする課題】しかし上記塩化ヨウ素
を用いた方法は、水槽と有機層の二層系となるため攪拌
効率の影響を受けやすく、スケールが大きくなった場
合、モノヨード置換体の選択的制御はやや困難になる傾
向がある。従って、上記方法においてジヨード置換体の
副生を抑制する為には、ヨウ素化転化率を抑える必要が
あり、また逆に転化率を上げるとジヨード置換体が増加
する為、蒸留により得られるモノヨード置換体の収率は
低下してしまうという問題点がある。本発明の目的は、
上記課題を解決し、容易に、高収率で、しかも高純度の
モノヨード置換9,9−ジアルキルフルオレンを工業的
に有利に製造する方法を提供することである。
However, the above-mentioned method using iodine chloride has a two-layer system consisting of a water tank and an organic layer, so that it is susceptible to the stirring efficiency. Control tends to be somewhat difficult. Therefore, in order to suppress the by-product of the diiodo-substituted product in the above method, it is necessary to suppress the iodination conversion, and conversely, if the conversion is increased, the diiodo-substituted product increases, so that the monoiodo-substituted product obtained by distillation is obtained. There is a problem that the body yield is reduced. The purpose of the present invention is
An object of the present invention is to solve the above-mentioned problems and to provide a method for easily and industrially advantageously producing a monoiodo-substituted 9,9-dialkylfluorene having a high yield and a high purity.

【0007】[0007]

【課題を解決するための手段】本発明者らは、工業的に
有意な9,9−ジアルキルモノヨードフルオレンの製造
法を確立するために鋭意検討した結果、副生したジヨー
ド置換体が固有の温度以上で脱ハロゲン化を起こし、対
応するモノヨード置換体に分解する事を見い出し、本発
明を完成した。
Means for Solving the Problems The inventors of the present invention have conducted intensive studies to establish an industrially significant method for producing 9,9-dialkylmonoiodofluorene. The present inventors have found that dehalogenation occurs at a temperature higher than or equal to the temperature and decomposes into a corresponding monoiodosubstituted product, thereby completing the present invention.

【0008】すなわち、本発明は、9,9−ジアルキル
フルオレンをヨウ素化してモノヨード置換−9,9−ジ
アルキルフルオレンを製造する方法において、副生した
ジヨード置換9,9−ジアルキルフルオレンを分解温度
以上で蒸留し、得られるモノヨード置換9,9−ジアル
キルフルオレンを分留することを特徴とするモノヨード
置換9,9−ジアルキルフルオレンの製造方法に関する
ものである。
That is, the present invention provides a method for producing a monoiodo-substituted-9,9-dialkylfluorene by iodinating a 9,9-dialkylfluorene, wherein the by-produced diiodosubstituted 9,9-dialkylfluorene is produced at a decomposition temperature or higher. The present invention relates to a method for producing a monoiodo-substituted 9,9-dialkylfluorene, which comprises distilling the obtained monoiodo-substituted 9,9-dialkylfluorene.

【0009】以下、本発明を詳細に説明する。本発明の
具体的な態様は、例えば9,9−ジアルキルフルオレン
をヨウ素化して得られた反応マスからまずモノヨード置
換体を蒸留し、続いて釜残のジヨード置換体をその分解
温度以上で更に蒸留してモノヨード置換体を回収し、高
純度の9,9−ジアルキル−2−ヨードフルオレンを高
収率で得る方法を挙げることができる。
Hereinafter, the present invention will be described in detail. In a specific embodiment of the present invention, for example, a monoiodo-substituted product is first distilled from a reaction mass obtained by iodination of 9,9-dialkylfluorene, and then the remaining diiodo-substituted product is further distilled at a decomposition temperature or higher. Then, the monoiodo-substituted product is recovered to obtain 9,9-dialkyl-2-iodofluorene of high purity in high yield.

【0010】本発明方法において、9,9−ジアルキル
フルオレンをヨウ素化して得られたヨード置換9,9−
ジアルキルフルオレンの蒸留は、理論段数が2段以上、
好ましくは3段以上の蒸留塔を用いて行う。
In the method of the present invention, iodo-substituted 9,9-dialkylfluorene obtained by iodination of 9,9-dialkylfluorene is used.
Dialkylfluorene distillation has two or more theoretical plates,
Preferably, it is carried out by using three or more distillation columns.

【0011】ヨウ素化後のはじめのモノヨード置換体の
蒸留は、可能な限り低温、即ち高真空下で行う必要があ
る。なぜならば、モノヨード置換9,9−ジアルキルフ
ルオレンは加熱により脱ハロゲン化を起こしやすいため
である。例えば、9,9−ジメチル−2−ヨードフルオ
レンは260℃、9,9−ジエチル−2−ヨードフルオ
レンは290℃、9,9−ジプロピル−2−ヨードフル
オレンは310℃を越えると徐々にヨウ素原子がヨウ化
水素、或いはヨウ素の形で脱離し、9,9−ジアルキル
フルオレンに分解する可能性があるためである。
[0011] The first distillation of the monoiodo-substituted product after iodination must be performed at a temperature as low as possible, that is, under a high vacuum. This is because monoiodo-substituted 9,9-dialkylfluorene easily undergoes dehalogenation by heating. For example, 9,9-dimethyl-2-iodofluorene is 260 ° C., 9,9-diethyl-2-iodofluorene is 290 ° C., and 9,9-dipropyl-2-iodofluorene is 310 ° C., the iodine atom is gradually increased. Is desorbed in the form of hydrogen iodide or iodine, and may be decomposed into 9,9-dialkylfluorene.

【0012】したがって、この分解を防ぐためには、は
じめの蒸留温度を少なくともモノヨード置換体の分解温
度以下、好ましくは分解温度より10℃以上低く設定す
る必要がある。
Therefore, in order to prevent this decomposition, it is necessary to set the initial distillation temperature at least lower than the decomposition temperature of the monoiodine-substituted product, preferably lower by at least 10 ° C. than the decomposition temperature.

【0013】具体的に、9,9−ジメチル−2−ヨード
フルオレンの場合は、260℃以下、好ましくは250
℃以下、9,9−ジエチル−2−ヨードフルオレンの場
合は、290℃以下、好ましくは280℃以下、9,9
ジプロピル−2−ヨードフルオレンの場合は、310
℃以下、好ましくは300℃以下で蒸留を行う。尚、未
反応の9,9−ジアルキルフルオレンは、初留として回
収することができる。
Specifically, in the case of 9,9-dimethyl-2-iodofluorene, the temperature is 260 ° C. or less, preferably 250 ° C.
° C or less, and in the case of 9,9-diethyl-2-iodofluorene, it is 290 ° C or less, preferably 280 ° C or less,
310 for dipropyl- 2-iodofluorene
The distillation is carried out at a temperature of at most 300C, preferably at most 300C. In addition, unreacted 9,9-dialkylfluorene can be recovered as a first distillation.

【0014】モノヨード置換体の蒸留後、釜に副生物の
ジヨード置換体が残渣として残る。これをジヨード置換
体の分解温度、好ましくは分解温度より高い温度で更に
減圧蒸留することで、対応するモノヨード置換体を得る
ことができる。
After distillation of the monoiodine-substituted product, a by-product diiodine-substituted product remains in the kettle as a residue. This is further distilled under reduced pressure at the decomposition temperature of the diiodo-substituted product, preferably at a temperature higher than the decomposition temperature, to obtain the corresponding mono-iodo-substituted product.

【0015】具体的には、ジヨード置換9,9−ジメチ
ルフルオレンの場合は分解温度が300℃なので、好ま
しくは300℃より高い温度で蒸留を行う。ジヨード置
換9,9−ジエチルフルオレンの場合は分解温度が31
0℃であるので、好ましくは310℃より高い温度で蒸
留を行う。また、ジヨード置換9,9−ジプロピルフル
オレンの場合は分解温度330℃なので、好ましくは3
30℃より高い温度で蒸留を行う。この操作により、副
生物として生成したジヨード置換体を対応するモノヨー
ド置換体として得ることができる。
Specifically, in the case of diiodo-substituted 9,9-dimethylfluorene, since the decomposition temperature is 300 ° C., the distillation is preferably carried out at a temperature higher than 300 ° C. In the case of diiodo-substituted 9,9-diethylfluorene, the decomposition temperature is 31.
Since it is 0 ° C., the distillation is preferably carried out at a temperature higher than 310 ° C. In the case of diiodo-substituted 9,9-dipropylfluorene, the decomposition temperature is 330 ° C.
The distillation is carried out at a temperature above 30 ° C. By this operation, a diiodo-substituted product generated as a by-product can be obtained as a corresponding mono-iodo-substituted product.

【0016】[0016]

【実施例】以下、本発明の方法を実施例により説明す
る。 実施例1 9,9−ジメチルフルオレン20g(0.10モル)、
酢酸70g、水10gを混合し、75℃に昇温した後、
50%塩化ヨウ素塩酸水溶液55g(0.17モル)を
加え、14時間反応させた。その後、200gのトルエ
ンで抽出し、10%チオ硫酸ナトリウム水溶液40ml
で残存ヨウ素を中和して分液し、10%苛性ソーダ水溶
液を加えて水層のpHを7にした後、分液、水洗、分液
後、有機層を濃縮し、オイル状のヨウ素化9,9−ジメ
チルフルオレンを得た。このオイルを理論段数5段の蒸
留塔を用い、まず2mmHg、150〜210℃で減圧
蒸留し、主留分の流出終了を確認後、ジヨード体を含む
残渣を分解させてモノヨード置換体を得る目的で真空を
7mmHgに変更し、310℃まで引き続き減圧蒸留を
行うことで、32.2gの9,9−ジメチル−2−ヨー
ドフルオレンを得た。
The method of the present invention will be described below with reference to examples. Example 1 20,9-dimethylfluorene 20 g (0.10 mol),
After mixing 70 g of acetic acid and 10 g of water and raising the temperature to 75 ° C,
55 g (0.17 mol) of a 50% aqueous solution of iodine chloride / hydrochloric acid was added, and the mixture was reacted for 14 hours. Then, the mixture was extracted with 200 g of toluene, and 40% of a 10% aqueous solution of sodium thiosulfate was added.
After neutralizing the remaining iodine with water and separating the solution, the pH of the aqueous layer was adjusted to 7 by adding a 10% aqueous solution of caustic soda, the solution was separated, washed with water, separated, and the organic layer was concentrated. , 9-Dimethylfluorene was obtained. This oil was distilled under reduced pressure at 2 mmHg and 150 to 210 ° C. using a distillation column having 5 theoretical plates, and after confirming the end of the main fraction, the distillate was contained.
The vacuum was changed to 7 mmHg in order to decompose the residue to obtain a monoiodo-substituted product, and distillation under reduced pressure was continued to 310 ° C. to obtain 32.2 g of 9,9-dimethyl-2-iodofluorene.

【0017】収率97.7%、融点66.0−67.0
℃、純度100%(ガスクロマトグラフィー分析によ
る) 元素分析(理論値 / 実測値) C ; 56.10 / 56.13 H ; 4.39 / 4.37
Yield 97.7%, melting point 66.0-67.0
° C, purity 100% (by gas chromatography analysis) Elemental analysis (theoretical / actual) C; 56.10 / 56.13H; 4.39 / 4.37

【0018】実施例2 9,9−ジエチルフルオレン22g(0.10モル)、
酢酸80g、水5gを混合し、75℃に昇温した後、5
0%塩化ヨウ素塩酸水溶液50g(0.15モル)を加
え、15時間反応させた。その後、220gのトルエン
で抽出し、10%チオ硫酸ナトリウム水溶液40mlで
残存ヨウ素を中和し、10%苛性ソーダ水溶液を加えて
水層のpHを7にした後、分液、水洗、分液後、有機層
を濃縮し、オイル状のヨウ素化9,9−ジエチルフルオ
レンを得た。このオイルを理論段数10段の蒸留塔を用
い、まず2mmHg、170〜240℃で減圧蒸留し、
主留分の流出終了を確認後、ジヨード体を含む残渣を分
解させてモノヨード置換体を得る目的で、真空を7mm
Hgに変更し、320℃まで引き続き減圧蒸留を行うこ
とで、31.4gの9,9−ジエチル−2−ヨードフル
オレンを得た。尚、初留分として1.5gの9,9−ジ
エチルフルオレンを回収した。
Example 2 22,9-diethylfluorene (22 g, 0.10 mol),
A mixture of 80 g of acetic acid and 5 g of water was heated to 75 ° C.
50 g (0.15 mol) of a 0% aqueous solution of iodine chloride / hydrochloric acid was added, and the mixture was reacted for 15 hours. Thereafter, the mixture was extracted with 220 g of toluene, the remaining iodine was neutralized with 40 ml of a 10% aqueous sodium thiosulfate solution, and a 10% aqueous solution of caustic soda was added to adjust the pH of the aqueous layer to 7, followed by liquid separation, water washing, and liquid separation. The organic layer was concentrated to obtain iodinated 9,9-diethylfluorene as an oil. This oil was distilled under reduced pressure at 2 mmHg and 170-240 ° C. using a distillation column having 10 theoretical plates.
After confirming the end of the main distillate, the residue containing diiodine
7mm purpose, a vacuum to obtain a monoiodo substitutions by solution
The pressure was changed to Hg and distillation under reduced pressure was continued to 320 ° C. to obtain 31.4 g of 9,9-diethyl-2-iodofluorene. In addition, 1.5 g of 9,9-diethylfluorene was recovered as the first fraction.

【0019】収率90.2%、沸点157−158.1
℃/1.5mmHg、純度99.9%(ガスクロマトグ
ラフィー分析による) 元素分析(理論値 / 実測値) C ; 58.47 / 58.52 H ; 5.20 / 5.25
Yield 90.2%, boiling point 157-18.1.
C / 1.5 mmHg, purity 99.9% (by gas chromatography analysis) Elemental analysis (theoretical value / actual value) C; 58.47 / 58.52 H; 5.20 / 5.25

【0020】実施例3 9,9−ジプロピルフルオレン25g(0.10モ
ル)、酢酸75g、水5gを混合し、75℃に昇温した
後、50%塩化ヨウ素塩酸水溶液50g(0.15モ
ル)を加え、15時間反応させた。その後、250gの
トルエンで抽出し、10%チオ硫酸ナトリウム水溶液4
0mlで残存ヨウ素を中和し、10%苛性ソーダ水溶液
を加えて水層のpHを7にした後、分液、水洗、分液
後、有機層を濃縮し、オイル状のヨウ素化9,9−ジプ
ロピルフルオレンを得た。このオイルを理論段数8段の
蒸留塔を用い、まず2mmHg、180〜250℃で減
圧蒸留し、主留分の流出終了を確認後、ジヨード体を含
む残渣を分解させてモノヨード置換体を得る目的で、
空を7mmHgに変更し、330℃まで引き続き減圧蒸
留を行うことで、34.5gの9,9−ジプロピル−2
−ヨードフルオレンを得た。尚、初留分として1.5g
の9,9−ジプロピルフルオレンを回収した。
Example 3 A mixture of 25 g (0.10 mol) of 9,9-dipropylfluorene, 75 g of acetic acid and 5 g of water was heated to 75 ° C., and 50 g of a 50% aqueous solution of iodine chloride hydrochloride (0.15 mol) was added. ) Was added and reacted for 15 hours. Then, it was extracted with 250 g of toluene, and 10% aqueous sodium thiosulfate solution 4
The remaining iodine was neutralized with 0 ml, and a 10% aqueous solution of sodium hydroxide was added to adjust the pH of the aqueous layer to 7. After separation, washing with water and separation, the organic layer was concentrated and iodinated in the form of oil. Dipropylfluorene was obtained. The oil used distillation column theoretical plate number 8 stages, first 2 mmHg, was distilled at 180 to 250 ° C., after confirming the outflow end of the main fraction, containing the diiodo body
The vacuum was changed to 7 mmHg and vacuum distillation was continued to 330 ° C. to obtain 34.5 g of 9,9-dipropyl-2 in order to decompose the residue to obtain a monoiodo-substituted product.
-Iodofluorene was obtained. In addition, 1.5 g as the first distillate
9,9-dipropylfluorene was recovered.

【0021】収率91.7%、沸点174.0−17
6.3℃/1.5mmHg、純度99.9%(ガスクロ
マトグラフィー分析による) 元素分析(理論値 / 実測値) C ; 60.49 / 60.57 H ; 3.61 / 3.66
Yield 91.7%, boiling point 174.0-17
6.3 ° C./1.5 mmHg, purity 99.9% (by gas chromatography analysis) Elemental analysis (theoretical value / actual value) C; 60.49 / 60.57 H; 3.61 / 3.66

【0022】実施例4 9,9−ジメチルフルオレン20g(0.10モル)、
50%硫酸40gを混合し、65℃に昇温した後、50
%塩化ヨウ素塩酸水溶液50g(0.15モル)を1時
間を要して滴下し、10時間反応させた。その後、16
0gのトルエンで抽出し、10%チオ硫酸ナトリウム水
溶液40mlで残存ヨウ素を中和して分液し、10%苛
性ソーダ水溶液を加えて水層のpHを7にした後、分
液、水洗、分液後、有機層を濃縮し、オイル状のヨウ素
化9,9−ジメチルフルオレンを得た。このオイルを理
論段数4段の蒸留塔を用い、まず1mmHg、140〜
200℃で減圧蒸留し、主留分の流出終了を確認後、
ヨード体を含む残渣を分解させてモノヨード置換体を得
る目的で、真空を7mmHgに変更し、300℃まで引
き続き減圧蒸留を行うことで、31.9gの9,9−ジ
メチル−2−ヨードフルオレンを得た。
Example 4 20 g (0.10 mol) of 9,9-dimethylfluorene,
After mixing 40 g of 50% sulfuric acid and raising the temperature to 65 ° C.,
50 g (0.15 mol) of a 10% aqueous solution of iodine chloride / hydrochloride was added dropwise over 1 hour, and the mixture was reacted for 10 hours. Then 16
The mixture was extracted with 0 g of toluene, neutralized with 40 ml of a 10% aqueous sodium thiosulfate solution to neutralize the remaining iodine, and separated. A 10% aqueous solution of sodium hydroxide was added to adjust the pH of the aqueous layer to 7, followed by separation, washing and separation. Thereafter, the organic layer was concentrated to obtain an iodinated 9,9-dimethylfluorene as an oil. Using a distillation column having 4 theoretical plates, this oil was first used at 1 mmHg,
It was distilled at 200 ° C., after confirming the outflow end of the main fraction, di
Decompose the residue containing iodine to obtain a mono-iodo-substituted product
For this purpose, the vacuum was changed to 7 mmHg and distillation under reduced pressure was continued to 300 ° C. to obtain 31.9 g of 9,9-dimethyl-2-iodofluorene.

【0023】収率96.7%、融点66.0−67.3
℃、純度99.9%(ガスクロマトグラフィー分析によ
る) 元素分析(理論値 / 実測値) C ; 56.10 / 56.18 H ; 4.39 / 4.49
Yield 96.7%, melting point 66.0-67.3.
° C, purity 99.9% (by gas chromatography analysis) Elemental analysis (theoretical / actual) C; 56.10 / 56.18H; 4.39 / 4.49

【0024】比較例 9,9−ジメチルフルオレン20g(0.10モル)、
酢酸70g、水10gを混合し、75℃に昇温した後、
50%塩化ヨウ素塩酸水溶液55g(0.17モル)を
加え、14時間反応させた。その後、200gのトルエ
ンで抽出し、10%チオ硫酸ナトリウム水溶液40ml
で残存ヨウ素を中和して分液し、10%苛性ソーダ水溶
液を加えて水層のpHを7にした後、分液、水洗、分液
後、有機層を濃縮し、オイル状のヨウ素化9,9−ジメ
チルフルオレンを得た。このオイルを理論段数5段の蒸
留塔を用い、2mmHg、150〜210℃で減圧蒸留
し、30.3gの9,9−ジメチル−2−ヨードフルオ
レンを得た。
Comparative Example 20 g (0.10 mol) of 9,9-dimethylfluorene,
After mixing 70 g of acetic acid and 10 g of water and raising the temperature to 75 ° C,
55 g (0.17 mol) of a 50% aqueous solution of iodine chloride / hydrochloric acid was added, and the mixture was reacted for 14 hours. Then, the mixture was extracted with 200 g of toluene, and 40% of a 10% aqueous solution of sodium thiosulfate was added.
After neutralizing the remaining iodine with water and separating the solution, the pH of the aqueous layer was adjusted to 7 by adding a 10% aqueous solution of caustic soda, the solution was separated, washed with water, separated, and the organic layer was concentrated. , 9-Dimethylfluorene was obtained. This oil was distilled under reduced pressure at 150 to 210 ° C. at 2 mmHg using a distillation column having 5 theoretical plates to obtain 30.3 g of 9,9-dimethyl-2-iodofluorene.

【0025】収率92.0%、融点66.1−67.0
℃、純度100%(ガスクロマトグラフィー分析によ
る) 元素分析(理論値 / 実測値) C ; 56.10 / 56.15 H ; 4.39 / 4.41
Yield 92.0%, melting point 66.1-67.0
° C, purity 100% (by gas chromatography analysis) Elemental analysis (theoretical value / actual value) C; 56.10 / 56.15H; 4.39 / 4.41

【0026】[0026]

【発明の効果】実施例からも明らかなように、本発明の
方法によれば、簡便、安全に、かつ低コストでモノヨー
ド置換9,9−ジアルキルフルオレンを選択的に製造す
ることができる。すなわち、本発明は、モノヨード置換
9,9−ジアルキルフルオレンの工業的に優れた製造法
を提供するものである。
As is clear from the examples, according to the method of the present invention, monoiodo-substituted 9,9-dialkylfluorene can be selectively produced simply, safely and at low cost. That is, the present invention provides an industrially excellent method for producing a monoiodo-substituted 9,9-dialkylfluorene.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 9,9−ジアルキルフルオレンをヨウ素
化してモノヨード置換−9,9−ジアルキルフルオレン
を製造する方法において、まずモノヨード置換体をその
分解温度以下で蒸留し、続いて釜残のジヨード置換体を
その分解温度以上で更に蒸留してモノヨード置換体を回
収し、モノヨード置換9,9−ジアルキルフルオレンを
分留することを特徴とするモノヨード置換9,9−ジア
ルキルフルオレンの製造方法。
1. A method for producing a monoiodo-substituted -9,9-dialkylfluorene by iodinating a 9,9-dialkylfluorene, wherein a monoiodo-substituted compound is first converted to a monoiodo-substituted product.
Distillation is carried out below the decomposition temperature.
Distillation is further performed at the decomposition temperature or higher to recover the monoiodo-substituted product.
A method for producing a monoiodo-substituted 9,9-dialkylfluorene , wherein the monoiodo-substituted 9,9-dialkylfluorene is fractionated and fractionated.
JP08797295A 1995-04-13 1995-04-13 Method for producing monoiodo-substituted 9,9-dialkylfluorene Expired - Fee Related JP3205211B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP08797295A JP3205211B2 (en) 1995-04-13 1995-04-13 Method for producing monoiodo-substituted 9,9-dialkylfluorene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08797295A JP3205211B2 (en) 1995-04-13 1995-04-13 Method for producing monoiodo-substituted 9,9-dialkylfluorene

Publications (2)

Publication Number Publication Date
JPH08283184A JPH08283184A (en) 1996-10-29
JP3205211B2 true JP3205211B2 (en) 2001-09-04

Family

ID=13929764

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3205211B2 (en)

Also Published As

Publication number Publication date
JPH08283184A (en) 1996-10-29

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