7-METHYL-3-METHYLENE-7-OCTENYL HALIDE, METHOD FOR PRODUCING THE SAME, AND METHOD FOR PRODUCING 7-METHYL-3-METHYLENE-7-OCTENYL PROPIONATE
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20160185690A1
公开(公告)日:2016-06-30
Provided is a simple, selective and efficient method for producing 7-methyl-3-methylene-7-octenyl propionate and the like. More specifically, provided is, for example, a method for producing 7-methyl-3-methylene-7-octenyl propionate, comprising the steps of: subjecting a nucleophile represented by Formula (1) and an electrophile represented by Formula (2) to a coupling reaction to obtain a 7-methyl-3-methylene-7-octenyl halide represented by Formula (3), and subjecting the 7-methyl-3-methylene-7-octenyl halide (3) to propionyloxylation to obtain the 7-methyl-3-methylene-7-octenyl propionate represented by Formula (4).
A series of isoprene coupling dimers bonded at 1-2, 1-3, 1-4, 2-4, 3-4, or 4-4 position was prepared by regiocontrolled catalysis of trasition metals or without catalysts in the reaction of 2-methyl-2-butene-1,4-diylmagnesium or 3-methyl-2-butenylmagnesium chloride with C5-alkenyl halides.
Coupling reaction involving a Grignard and allylic halide
申请人:SCM Corporation
公开号:US04221742A1
公开(公告)日:1980-09-09
Disclosed is a process for the coupling of a Grignard reagent RMgX with an allylic halide in the presence of a dipolar aprotic solvent wherein the improvement, for obtaining improved yield and selectivity, comprises adding a catalyst to said Grignard or allylic halide and then carrying out the coupling reaction by the addition of the Grignard reagent to the allylic halide, said reaction being characterized by the displacement at the gamma position (relative to the halide) of the allylic halide with R of the Grignard reagent, migration of the allylic double bond in the direction of the halogen atom and loss of halogen. The present invention also resides in the discovery of certain novel procedures for the synthesis of Vitamin E. Specific embodiments of this aspect of the invention reside in the syntheses of 6,7-dehydrophytol, 10,11-dihydrofarnesene, phytone, hexahydropseudoionone, and related compounds as precursors for Vitamin E.
Coupling reaction involving a grignard and allylic halide
申请人:SCM Corporation
公开号:US04293497A1
公开(公告)日:1981-10-06
Disclosed is a process for the coupling of a Grignard reagent RMgX with an allylic halide in the presence of a dipolar aprotic solvent wherein the improvement, for obtaining improved yield and selectivity, comprises adding a catalyst to said Grignard or allylic halide and then carrying out the coupling reaction by the addition on the Grignard reagent to the allylic halide, said reaction being characterized by the displacement at the gamma position (relative to the halide) of the allylic halide with R of the Grignard reagent, migration of the allylic double bond in the direction of the halogen atom and loss of halogen. The present invention also resides in the discovery of certain novel procedures for the synthesis of Vitamin E. Specific embodiments of this aspect of the invention reside in the syntheses of 6,7-dehydrophytol, 10,11-dihydrofarnesene, phytone, hexahydropseudoionone, and related compounds as precursors for Vitamin E.
申请人:The Regents of the University of California, a California corporation
公开号:US20150148314A1
公开(公告)日:2015-05-28
There are provided, inter alia, derivatives of seriniquinone and methods useful for the treatment of cancer, and in particular treatment of melanoma and prostate cancer.