MICHAEL ADDITION-PETERSON OLEFINATION SEQUENCE OF METHYL 2-(TRIMETHYLSILYL)ACRYLATE AS A CONVENIENT METHOD FOR CONSECUTIVE FORMATION OF CARBON-CARBON SINGLE AND DOUBLE BONDS
作者:Otohiko Tsuge、Shuji Kanemasa、Yusuke Ninomiya
DOI:10.1246/cl.1984.1993
日期:1984.11.5
A convenient method for the consecutive formation of carbon–carbon single and double bonds is presented with the example of the Peterson olefination of the carbanions resulted from the Michaeladdition of organometallics to methyl 2-(trimethylsilyl)acrylate.
Stereochemical course of the palladium-catalysed arylation of disubstituted activated alkenes with benzoyl chloride
作者:Alwyn Spencer
DOI:10.1016/s0022-328x(00)82516-4
日期:1982.12
The palladium-catalysedarylation of ten 1,1- and 1,2-disubstituted activated alkenes with benzoyl chloride was studied. In most cases, more than one product was formed. The stereochemical course of the arylation appears to be controlled by the polarity of the double bond, the tendency to cis (suprafacial) alkene insertion and subsequent re-elimination, steric hindrance in the alkylpalladium(II) species
Palladium-catalyzed cross-coupling of aryl and alkenyl boronic acids with alkenes via oxidative addition of a carbonboron bond to palladium(O)
作者:Chan Sik Cho、Sakae Uemura
DOI:10.1016/0022-328x(94)87040-3
日期:1994.2
those from arylboronic acids. Similar treatment of sodium tetraphenylborate (NaBPh4) with alkenes also affords the corresponding phenylated alkenes in high yields together with biphenyl and benzene as side products. Oxidative addition of a carbonboron bond to palladium(O), formed in situ, to give an organopalladium(II) species is assumed to be the key step of these cross-coupling reactions.
Diastereoselectivity in the alkylation and protonation of some β-silyl enolates
作者:Ian Fleming、John H. M. Hill、David Parker、David Waterson
DOI:10.1039/c39850000318
日期:——
A wide variety of β-silyl enolates are alkylated or protonated with high diastereoselectivity, which appears to be substantially electronic in origin.
各种各样的β-甲硅烷基烯醇化物以高非对映选择性被烷基化或质子化,这似乎基本上是电子起源的。
The diastereoselectivity of electrophilic attack on trigonal carbon adjacent to a stereogenic centre: diastereoselective alkylation and protonation of open-chain enolates having a stereogenic centre carrying a silyl group at the ? position
作者:Roger A. N. C. Crump、Ian Fleming、John H. M. Hill、David Parker、N. Laxma Reddy、David Waterson
DOI:10.1039/p19920003277
日期:——
The alkylation and protonation of enolates having a β-silyl group, prepared by conjugate addition of a silyl-cuprate reagent to enone systems, are almost always highly diastereoselective in the sense 3 in a wide variety of reactions. The effects of varying the type of enolate (Scheme 1) and its geometry, the size of the medium-sized group R1 on the stereogenic centre (Scheme 3), the nature of the alkylating