DD293805A5 - PROCESS FOR PREPARING SUBSTITUTED 2- (5-OXO-PENT-2-EN-1-YLIDENES) -INDAN-1-ONE - Google Patents
PROCESS FOR PREPARING SUBSTITUTED 2- (5-OXO-PENT-2-EN-1-YLIDENES) -INDAN-1-ONE Download PDFInfo
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- DD293805A5 DD293805A5 DD34012890A DD34012890A DD293805A5 DD 293805 A5 DD293805 A5 DD 293805A5 DD 34012890 A DD34012890 A DD 34012890A DD 34012890 A DD34012890 A DD 34012890A DD 293805 A5 DD293805 A5 DD 293805A5
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- German Democratic Republic
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- indan
- oxo
- pent
- ylidene
- substituted
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Abstract
Die Erfindung betrifft ein Verfahren zur Herstellung substituierter * der Formel III, in der R1, R2 und R3 Arylreste bedeuten. Verbindungen dieses Typs eignen sich als organische Zwischenprodukte zur Synthese polycyclischer aromatischer Kohlenwasserstoffe. Die Titelverbindungen werden erfindungsgemaesz hergestellt, indem man Pyryliumsalze der Formel I (R1-R3 Aryl, X beliebiges Anion) mit Indan-1-on (Formel II) in Gegenwart einer Pufferkomponente, die ein Dialkylamin- oder Alkalimetallsalz einer schwachen Saeure, ein Trialkylamin oder ein aequimolares Gemisch aus Trialkylamin und schwacher Saeure sein kann, in Loesungsmitteln wie niederen aliphatischen Alkoholen, Halogenkohlenwasserstoffen oder dipolar-aprotischen Solventien umsetzt und dabei Temperaturen bis zum Siedepunkt des Reaktionsgemisches anwendet.{* organische Zwischenprodukte; Pyryliumsalze; Indan-1-on}The invention relates to a process for the preparation of substituted * of the formula III, in which R1, R2 and R3 are aryl radicals. Compounds of this type are useful as organic intermediates for the synthesis of polycyclic aromatic hydrocarbons. The title compounds are prepared according to the invention by adding pyrylium salts of formula I (R1-R3 aryl, X any anion) with indan-1-one (formula II) in the presence of a buffer component containing a dialkylamine or alkali metal salt of a weak acid, a trialkylamine or may be an equimolar mixture of trialkylamine and weak acid, converted into solvents such as lower aliphatic alcohols, halogenated hydrocarbons or dipolar aprotic solvents using temperatures up to the boiling point of the reaction mixture. {* organic intermediates; pyrylium; Indan-1-one}
Description
Ausführungsbeispieleembodiments
Substituierte 2-(5-Oxo-pent-2-en-1-yliden)-indan-1-one III durch Umsetzung von Pyryliumsalzen I mit lndan-1-on Il in niederen aliphatischen Alkoholen oder dipolar-aprotischen Lösungsmitteln (allgemeine Arbeitsvorschrift, Variante A; vgl. Tab. 1) Man erhitzt 5mmol Pyryliumsalz I (X - CIO4), 0,99g (7,5mmol) lndan-1-on Hund lOmmol Pufferkomponente in 10ml des jeweiligen Lösungsmittels 2 Std. unter Rückfluß. Die sich unter Kühlung aus dem Reaktionsgemisch abscheidenden Rohprodukte werden abgesaugt, mit Ethanol gewaschen und aus Ethanol/Aceton umkristallisiert.Substituted 2- (5-oxo-pent-2-en-1-ylidene) -indan-1-ones III by reaction of pyrylium salts I with indan-1-one II in lower aliphatic alcohols or dipolar aprotic solvents (general procedure, Variant A, see Table 1) 5 mmol of pyrylium salt I (X-CIO 4 ), 0.99 g (7.5 mmol) of indan-1-one dog 10 mmol buffer component in 10 ml of the respective solvent for 2 hours under reflux. The precipitated with cooling from the reaction mixture crude products are filtered off with suction, washed with ethanol and recrystallized from ethanol / acetone.
Substituierte 2-(5-Oxo-pent-2-en-1-yliden)-indan-1-one III durch Umsetzung von Pyryliumsalzen I mit Indan-'l-on Il in Halogenkohlenwasserstoffen (allgemeine Arbeitsvorschrift, Variante B; vgl. Tab. 1) 5mmol Pyryliumsalz KX = CIO4), 0,99g (7,5mmol) indan-1-on Il und lOmmol Pufferkomponente werden in 10ml Halogenkohlenwasserstoff 2Std. unter Rückfluß erhitzt. Nach dem Erkalten wird das Reaktionsgemisch mit Wasser versetzt, die organische Phase abgetrennt und die wäßrige Phase zweimal mit dem zur Reaktion benutzten Halogenkohlenwasserstoff extrahiert. Nach zweimaligem Waschen der organischen Lösungen mit Wasser trocknet man über Natriumsulfat, zieht das Lösungsmittel i.Vak. ab und bringt den verbleibenden Rückstand durch Behandeln mit Ethanol zur Kristallisation. Die ReinigungSubstituted 2- (5-oxo-pent-2-en-1-ylidene) -indan-1-ones III by reaction of pyrylium salts I with indan-1'-one Il in halogenated hydrocarbons (general procedure, variant B, see Tab 1) 5mmol pyrylium salt KX = CIO 4 ), 0.99g (7.5mmol) indan-1-one II and 10mmol buffer component are dissolved in 10ml of halocarbon 2h. heated to reflux. After cooling, the reaction mixture is treated with water, the organic phase separated and the aqueous phase extracted twice with the halogenated hydrocarbon used for the reaction. After washing the organic solutions twice with water, it is dried over sodium sulfate, the solvent is drawn in vacuo. and brings the remaining residue by treatment with ethanol for crystallization. The cleaning
erfolgt analog Ausführungsbeispieltakes place analogously to the embodiment
Ausbeuten und Schmelzpunkte der gemäß den Ausführungsbeispielen hergestellten 2-(5-Oxo-pent-2-en-1-yliden)-indan-1-Yields and melting points of 2- (5-oxo-pent-2-en-1-ylidene) -indan-1 prepared according to the embodiments
one IIIone III
-indan-1-onindan-1-one
Var.Var.
R'R '
R2 R 2
Pufferkomponentebuffer component
Lösungsmittelsolvent
Ausb. FpY. fp
{%)" (0C){%) "( 0 C)
2-(5-Oxo-1,3,5-tri-2- (5-oxo-1,3,5-tri-
phenyl-pent-2-en-1-phenyl-pent-2-en-1-
yliden)-(llla)ylidene) - (IIIa)
2-(5-Oxo-1.3,5-tri-2- (5-oxo-1.3,5-tri-
phenyl-pent-2-en-1-phenyl-pent-2-en-1-
yliden)-(llla)ylidene) - (IIIa)
A AA A
A A A A A AA A A A A A
A A AA A A
A A A BA A A B
B BB B
PhPh
PhPh
PhPh
PhPh
2-[3-(4-Methyl-phe-2- [3- (4-methyl-phe
nyl)-5-oxo-1,5-diphe-nyl) -5-oxo-1,5-diphenyl
nyl-pent-2-en-1-nyl-pent-2-en-1-
yliden]-(lllb)ylidene] - (IIIb)
2-[3-(4-Methoxy-phe-2- [3- (4-methoxy-phe
nyl)-5-oxo-1,5-diphe-nyl) -5-oxo-1,5-diphenyl
nyl-pent-2-en-1-nyl-pent-2-en-1-
yliden]-(lllc)ylidene] - (IIIc)
2-[3-(4-Chlor-phenyl)-2- [3- (4-chloro-phenyl) -
5-oxo-1,5-dipheivl-5-oxo-1,5-dipheivl-
pent-2-en-1-yliden]-pent-2-en-1-ylidene] -
PhPh
PhPh
PhPh
4-Me-C6H4 Ph4-Me-C 6 H 4 Ph
4-MeO-C6H4 Ph4-MeO-C 6 H 4 Ph
4-CI-C6H4 Ph4-CI-C 6 H 4 Ph
Piperidinacetat Ethanol 60Piperidine acetate ethanol 60
Piperidinacetat Ethanol 67Piperidine acetate ethanol 67
150-152150-152
150-152150-152
169-170169-170
147-148147-148
148-149148-149
Tabelle 1 (Fortsetzung)Table 1 (continued)
-indan-1-onindan-1-one
Var.Var.
R1 R 1
Pufferkomponentebuffer component
Lösungsmittelsolvent
Ausb. FpY. fp
(%)" CC)(%) "CC)
2-[3-(4-Brom-phenyl)- A 5-OXO-1,5-diphenylpent-2-en-1-yliden]-2- [3- (4-Bromo-phenyl) -A5-OXO-1,5-diphenylpent-2-en-1-ylidene] -
2-[3-(4-Nitro-phenyl)- A 5-oxo-1,5-diphenylpent-2-en-1-yliden]-2- [3- (4-nitrophenyl) -A5-oxo-1,5-diphenylpent-2-en-1-ylidene] -
2-[1,5-Bis(4-methyl- A phenyl)-5-oxo-3-phenyl-pent-2-en-1- yliden]-(lllg)2- [1,5-bis (4-methyl-A-phenyl) -5-oxo-3-phenyl-pent-2-en-1-ylidene] - (IIIg)
2-[1,5-Bis(4-chlor- A2- [1,5-bis (4-chloro-A
phenyl)-5-oxo-3-phenyl-pent-2-en-1- yliden]-(lllh)phenyl) -5-oxo-3-phenyl-pent-2-en-1-ylidene] - (IIIh)
2-[1,5-Bis(4-brom- A2- [1,5-bis (4-bromo-A
phenyl)-5-oxo-3-phenyl-pent-2-en-1-phenyl) -5-oxo-3-phenyl-pent-2-en-1-
PhPh
PhPh
4-Br-C6H4 Ph4-Br-C 6 H 4 Ph
4-O2N-C6H4 Ph Piperidinacetat Ethanol4-O 2 NC 6 H 4 Ph piperidine acetate ethanol
Piperidinacet'-.t EthanolPiperidine aceto-t-ethanol
4-Me-C6H4 Ph 4-Me-C6H4 Piperidinacetat Ethanol4-Me-C 6 H 4 Ph 4-Me-C 6 H 4 piperidine ethanol
4-CI-C6H4 Ph 4-CI-C6H4 Piperidinacetat Ethanol4-CI-C 6 H 4 Ph 4-CI-C 6 H 4 piperidine acetate ethanol
4-Br-C6H4 Ph 4-Br-C6H4 Piperidinacetat Ethanol4-Br-C 6 H 4 Ph 4-Br-C 6 H 4 piperidine acetate ethanol
73 168-17073 168-170
60 168-17060 168-170
62 140-14262 140-142
82 170-17182 170-171
84 189-19184 189-191
1 Die Ausbeuten beziehen sich auf die Rohprodukte;1 The yields refer to the crude products;
2 Durch Vereinigung äquimolarer Mengen Amin und Säure direkt im Reaktionsgemisch erzeugt.2 By mixing equimolar amounts of amine and acid directly into the reaction mixture.
JfiJfi
R'R '
R1 R 1
X IX I
Pufferkomponentebuffer component
-HX-HX
Claims (2)
Die Erfindung wird nachfolgend an zwei Ausführungsbeispielen in Form allgemeiner Arbeitsvorschriften erläutert.In solution I lanone type III exist as a mixture of the E and Z form, between which an equilibrium is established, the position of which depends on the solvent used.
The invention is explained below with reference to two exemplary embodiments in the form of general working instructions.
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DD34012890A DD293805A5 (en) | 1990-04-26 | 1990-04-26 | PROCESS FOR PREPARING SUBSTITUTED 2- (5-OXO-PENT-2-EN-1-YLIDENES) -INDAN-1-ONE |
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DD34012890A DD293805A5 (en) | 1990-04-26 | 1990-04-26 | PROCESS FOR PREPARING SUBSTITUTED 2- (5-OXO-PENT-2-EN-1-YLIDENES) -INDAN-1-ONE |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114380679A (en) * | 2020-10-19 | 2022-04-22 | 中国科学院大连化学物理研究所 | Palladium catalytic oxidation coupling method |
-
1990
- 1990-04-26 DD DD34012890A patent/DD293805A5/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114380679A (en) * | 2020-10-19 | 2022-04-22 | 中国科学院大连化学物理研究所 | Palladium catalytic oxidation coupling method |
CN114380679B (en) * | 2020-10-19 | 2022-12-20 | 中国科学院大连化学物理研究所 | Palladium catalytic oxidation coupling method |
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