JPS5748934A - Preparation of 2-substituted cycloalkanone - Google Patents

Preparation of 2-substituted cycloalkanone

Info

Publication number
JPS5748934A
JPS5748934A JP12554880A JP12554880A JPS5748934A JP S5748934 A JPS5748934 A JP S5748934A JP 12554880 A JP12554880 A JP 12554880A JP 12554880 A JP12554880 A JP 12554880A JP S5748934 A JPS5748934 A JP S5748934A
Authority
JP
Japan
Prior art keywords
substituted
acid
water
pref
raw material
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.)
Granted
Application number
JP12554880A
Other languages
Japanese (ja)
Other versions
JPS6338012B2 (en
Inventor
Junji Kawashima
Kuniaki Goto
Akinobu Osawa
Shinichi Hirakawa
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.)
Zeon Corp
Original Assignee
Nippon Zeon Co 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 Nippon Zeon Co Ltd filed Critical Nippon Zeon Co Ltd
Priority to JP12554880A priority Critical patent/JPS5748934A/en
Publication of JPS5748934A publication Critical patent/JPS5748934A/en
Publication of JPS6338012B2 publication Critical patent/JPS6338012B2/ja
Granted legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To prepare the titled compound useful as an intermediate of pesticide, medicine, perfume, etc., in shortened steps, without producing by-product and waste water, in high efficiency, by heating a 2-substituted enamine at a specific temperature in the presence of water and pref. a sulfonic acid.
CONSTITUTION: The compound of formula II (esp. 2-substituted cyclopentanone) is prepared by heating a 2-substituted enamine of formula I (R1 is hydrocarbon residue; R2 is secondary amino residue; n is integer 2W9) at 50W150°C (pref. 80W 130°C) in the presence of water. Addition of 0.1W10pts.wt. of a sulfonic acid (e.g. p-toluenesulfonic acid, methylsulfonic acid, etc.) per 100pts.wt. of the raw material to the reaction system is preferable in view of the yield improvement. It is also desirable for the similar purpose to carry out the reaction in the presence of a hydroplilic organic solvent (e.g. lower alcohol) or a surface active agent (e.g. higher carboxylic acid or its alkali metal salt) compatible with the raw material.
COPYRIGHT: (C)1982,JPO&Japio
JP12554880A 1980-09-10 1980-09-10 Preparation of 2-substituted cycloalkanone Granted JPS5748934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12554880A JPS5748934A (en) 1980-09-10 1980-09-10 Preparation of 2-substituted cycloalkanone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12554880A JPS5748934A (en) 1980-09-10 1980-09-10 Preparation of 2-substituted cycloalkanone

Publications (2)

Publication Number Publication Date
JPS5748934A true JPS5748934A (en) 1982-03-20
JPS6338012B2 JPS6338012B2 (en) 1988-07-28

Family

ID=14912918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12554880A Granted JPS5748934A (en) 1980-09-10 1980-09-10 Preparation of 2-substituted cycloalkanone

Country Status (1)

Country Link
JP (1) JPS5748934A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946467A (en) * 1988-03-14 1990-08-07 Gunze Limited Surgical suture
CN102503791A (en) * 2011-11-25 2012-06-20 天津理工大学 Method for producing 2-alkylene grease cyclic ketone by adopting bionic catalytic system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5040540A (en) * 1973-05-24 1975-04-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5040540A (en) * 1973-05-24 1975-04-14

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946467A (en) * 1988-03-14 1990-08-07 Gunze Limited Surgical suture
CN1051718C (en) * 1988-03-14 2000-04-26 官支株式会社 Surgical suture
CN102503791A (en) * 2011-11-25 2012-06-20 天津理工大学 Method for producing 2-alkylene grease cyclic ketone by adopting bionic catalytic system

Also Published As

Publication number Publication date
JPS6338012B2 (en) 1988-07-28

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