21676-07-3Relevant articles and documents
CP2TiCl2-catalyzed hydroalumination of internal alkynes: An access to (Z)-olefins
Parenty, Arnaud,Campagne, Jean-Marc
, p. 1231 - 1233 (2007/10/03)
The reduction of alkynols with LiAlH4 in diglyme is a long known process leading to the formation of (E)-alkenols. We have, by serendipity, found that, in the presence of a catalytic amount (10%) of Cp2TiCl2, the stereoselectivity of the reaction is reversed, leading to the selective formation of the (Z)-alkenols. The scope and limitations of this methodology and a postulated catalytic cycle are also discussed.
FRGMENTATION INDUITE PAR LE SILICIUM (II). SYNTHESE STEREOSELECTIVE DU NONACOSADIENE-7(Z), 11(Z), PHEROMONE DE CONTACT DE DROSOPHILA MELANOGASTER
Bac, Nguyen Van,Fall, Yagamare,Langlois, Yves
, p. 841 - 844 (2007/10/02)
7(Z),11(Z)-nonacosadiene 1, pheromone of Drosophila melanogaster, has been prepared from tetrahydropyridine 3 via a silicon induced fragmentation, a coupling reaction with Grignard reagent and a Witting olefination.
