JPS5557535A - Preparation of delta-ketocarboxylic acid - Google Patents

Preparation of delta-ketocarboxylic acid

Info

Publication number
JPS5557535A
JPS5557535A JP12953678A JP12953678A JPS5557535A JP S5557535 A JPS5557535 A JP S5557535A JP 12953678 A JP12953678 A JP 12953678A JP 12953678 A JP12953678 A JP 12953678A JP S5557535 A JPS5557535 A JP S5557535A
Authority
JP
Japan
Prior art keywords
water
calcium hydroxide
cyclohexanedione
geranyl
formulas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12953678A
Other languages
Japanese (ja)
Inventor
Onori Fukuoka
Noriaki Kihara
Kenji Saeki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP12953678A priority Critical patent/JPS5557535A/en
Publication of JPS5557535A publication Critical patent/JPS5557535A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the title substances at low cost and in high yield, by the ring- closure of 2-geranyl-1,3-cyclohexanedione in the presence of water and calcium hydroxide.
CONSTITUTION: By the ring-closure of 2-geranyl-1,3-cyclohexanedione having three kinds of isomers of formulas I, II and III, in the presence of water and calcium hydroxide, δ-ketocarboxylic acids of formulas IV, V and VI corresponding to the raw materials are obtained. Less than 500mol of water (preferably 25W200mol) and 0.5W5mol of calcium hydroxide (preferably 0.5W1mol) are used to 1mol of the raw materials. The reaction temperature is 80W150°C (preferably 90W110°C) and the reaction time is 9W12hr. Since δ-ketocarboxylic acids are obtained in the form of calcium salts, they are made free by the addition of a strong acid such as hydrochloric acid or sulfuric acid, and then separated from water layer with ether, etc.
COPYRIGHT: (C)1980,JPO&Japio
JP12953678A 1978-10-23 1978-10-23 Preparation of delta-ketocarboxylic acid Pending JPS5557535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12953678A JPS5557535A (en) 1978-10-23 1978-10-23 Preparation of delta-ketocarboxylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12953678A JPS5557535A (en) 1978-10-23 1978-10-23 Preparation of delta-ketocarboxylic acid

Publications (1)

Publication Number Publication Date
JPS5557535A true JPS5557535A (en) 1980-04-28

Family

ID=15011939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12953678A Pending JPS5557535A (en) 1978-10-23 1978-10-23 Preparation of delta-ketocarboxylic acid

Country Status (1)

Country Link
JP (1) JPS5557535A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8960377B2 (en) 2007-03-29 2015-02-24 Otis Elevator Company Non-linear spring isolation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8960377B2 (en) 2007-03-29 2015-02-24 Otis Elevator Company Non-linear spring isolation device

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