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1. CN1155880 - Process for obtaining unsautrated cycloaliphatic ketones

Office China
Application Number 96190608.1
Application Date 28.05.1996
Publication Number 1155880
Publication Date 30.07.1997
Publication Kind A
IPC
C07C 45/74
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
45Preparation of compounds having C=O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
61by reactions not involving the formation of C=O groups
67by isomerisation; by change of size of the carbon skeleton
68by increase in the number of carbon atoms
72by reaction of compounds containing C=O groups with the same or other compounds containing C=O groups
74combined with dehydration
C07C 49/647
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
49Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
587Unsaturated compounds containing a keto group being part of a ring
647having unsaturation outside the ring
CPC
H01R 13/7033
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
13Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
66Structural association with built-in electrical component
70with built-in switch
703operated by engagement or disengagement of coupling parts, ; e.g. dual-continuity coupling part
7031Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
7033making use of elastic extensions of the terminals
H01R 13/7039
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
13Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
66Structural association with built-in electrical component
70with built-in switch
703operated by engagement or disengagement of coupling parts, ; e.g. dual-continuity coupling part
7039the coupling part with coding means activating the switch to establish different circuits
Applicants Firmenich S.A.
弗门尼舍有限公司
Inventors Ferdinand Naef
费迪南·内埃弗
Rene Decorzant
勒内·德科赞
Agents WEN QI
中原信达知识产权代理有限责任公司
Priority Data 1676/95-5 08.06.1995 CH
Title
(EN) Process for obtaining unsautrated cycloaliphatic ketones
(ZH) 制备不饱和环脂族酮的方法
Abstract
(EN)
The invention concerns cycloaliphatic ketones of formula (I) which have two conjugated double bonds in positions 1 and 3, or 2 and 4, as shown by the dashed lines, and in which formula R defines a C1-C3 alkyl radical. The cycloaliphatic ketones are used as intermediate products in the preparation of jasmonic derivatives and are obtained by an addition reaction between cyclopentanone and an aldehyde of formula (II) of which the double bond has the configuration (E) and in which R has the meaning given above, to provide a dienic cyclopentanone of formula (Ia) E,E. The resulting cyclopentanone is optionally subjected to a heat treatment to give a cyclopentenone of formula (Ib) Z. 2-(E,2'Z)-but-2'-enylidene-cyclopentanone, 2-(1'Z)-but-1'-enyl-cyclopent-2-enone, 2-(E,2'E)-pent-2'-enylidene-cyclopentanone, 2-(Z,2'E)-pent-2'-enylidene-cyclopentanone, 2-(1'Z)-pent-1'-enyl-cyclopent-2-enone, dimethyl [2-(pent-(1'Z)-enyl)-3-oxo-1-cyclopentyl]-malonate malonic esters and dimethyl [2-(but-(1'Z)-enyl)-3-oxo-1-cyclopentyl]-malonate malonic esters are novel chemical compounds.

(ZH)

如I通式的不饱和环脂族酮,在它的1和3,或者2和4位碳上有两个如虚线所示的共轭双键,其中R表示C1到C3的烷基,在制备茉莉酮衍生物时做中间产物,它经过通式(II)的醛与环戊酮加成反应制得,其中,双键有(E)的构型,而R与上述限定相同,得到一种通式为(Ia)E,E的二烯环戊酮,以及选择性地加热处理形成的环戊酮,生成通式(Ib)Z的环戊烯酮,2-(E,2′Z)-丁-2′-亚烯基-环戊酮;2-(1′Z)-丁-1′-烯基-环戊-2-烯酮;2-(E,2′E)-戊-2′-亚烯基-环戊酮;2-(Z,2′E)-戊-2′-亚烯基-环戊酮;和2-(1′Z)-戊-1′-烯基-环戊-2-烯酮;以及[2-(戊-(1′Z)-烯基)-3-氧代-1-环戊]-丙二酸二甲酯;和[2-(丁-(1′Z)-烯基)-3-氧代-1-环戊]-丙二酸二甲酯是新的化学物质。