Synthesis of enantiomericcis-homocaronic acids from (+)-3-carene
作者:F. Z. Makaev、F. Z. Galin、G. A. Tolstikov
DOI:10.1007/bf00702141
日期:1995.2
The syntheses of the dimethylester of (-)-(1R)-cis-homocaronic acid (7 steps, overall yield 43 %) and its antipode, the dimethylester of (+)-(1S)-cis-homocaronic acid (5 steps, overall yield 27 %), were performed starting from (+)-3-carene and its derivatives, (+)-4α-acetyl-2-carene and (+)-4α-acetoxymethyl-2-carene. Oxidative cleavage in the key stages was carried out by ozonization.
作者:Deepa Bakshi、Verinder K. Mahindroo、R. Soman、Sukh Dev
DOI:10.1016/0040-4020(89)80108-5
日期:1989.1
(+)-Car-3-ene has been converted by a simple route into (-)--caronaldehydic acid hemiacetal, an important intermediate in the commercial production of certain synthetic pyrethroids.
Compounds of the formula ##STR1## wherein R.sup.1 is a hydrocarbyl group, W is a chlorine or bromine atom or --OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the natural terpene, 3-carene.
Preparation of 2,2-dimethyl-3-((oxyimino)methyl)cyclopropanecarboxylic
申请人:Shell Oil Company
公开号:US04218402A1
公开(公告)日:1980-08-19
2,2-Dimethyl-3-((oxyimino)methyl)cyclopropanecarboxylic acids are prepared by treating the mixed anhydride of acetic and caronaldehydic acids with an acid addition salt of a hydroxylamine or of a hydrocarbyloxylamine followed by hydrolysis of the oxyimino-substituted product thereby obtained.