Treatment of (3,3-dialkyl-2,2-dichlorocyclopropyl)methanols with hydrobromic acid gives 2-cyclopentenones through postulated intermediates, 3-chlorocyclopentadienyl cations. Another method which sh...
Dimethylaluminum halide induced reactions of formaldehyde with alkynes. Synthesis of α-allenic alcohols and Z-3-chloroallylic alcohols
作者:David J. Rodini、Barry B. Snider
DOI:10.1016/0040-4039(80)80199-7
日期:1980.1
The CH2O·Me2AlCl complex reacts with terminal alkynes to give α-allenicalcohols via a formal ene reaction and Z-3-chloroallylicalcohols via a stereospecifically syn Friedel-Crafts addition.
Nickel-catalyzed preparation of stereodefined allylic alcohols using silicon-tethered ynals
作者:Mario Lozanov、John Montgomery
DOI:10.1016/s0040-4039(01)00461-0
日期:2001.5
The nickel-catalyzed cyclization of silicon-tethered ynals is reported. The silicon heterocycles obtained may be converted into allylicalcohols that possess a stereodefined alkene unit via a cleavage process that involves stereospecific protodesilylation of the vinyl silane functionality.
The perfume compositions of this invention include one or more of 3-methylnonan-3-ol, 3-methyl-1-nonen-3-ol, 3-methylnonan-1-ol, 3-methyl-2-nonen-1-ol and the monocarboxylic acid esters of these alcohols. The perfume compositions also contain a perfume component, the odoriferous properties of which are enhanced and modified by said alcohols or esters of the alcohols without chemical reaction.
An Efficient Stereoselective Synthesis of Substituted 1,3-Dienes
作者:Philip Parsons、Kyungsoo Oh、Dave Cheshire
DOI:10.1055/s-2004-836022
日期:——
A stereoselectivesynthesis of substituted 1,3-dienes has been developed which utilises an Ireland-Claisen rearrangement/silicon-mediated fragmentation sequence. This sequence has been designed to introduce remote centres of asymmetry as well as stereodefined diene systems, and its application to an aziridine system is also described.