Ethylenic acyl cyanides I.: conjugate addition of allyl and allenylsilanes to ethylenic acyl cyanides.
作者:Abdelkebir Jellal、Maurice Santelli
DOI:10.1016/s0040-4039(00)74530-8
日期:1980.1
δ,ε-Ethylenic (or acetylenic) acyl cyanides, or δ,ε-ethylenic (or acetylenic) acids and their methyl esters, can be obtained by a conjugate addition of allyl (or allenyl) silanes to α,β-ethylenic acyl cyanides.
AgNTf<sub>2</sub>-Mediated Allylation with Allylsilanes at C3<i>a</i>-Position of Hexahydropyrroloindoles: Application to Total Syntheses of Amauromine Alkaloids
various allyl groups including the reverse prenyl group. The utility of this reaction is demonstrated by total synthesis of amauromine alkaloids. Stepwise bromocyclizations of the bis-indolylmethyl diketopiperazine derivative and subsequent double reverse prenylation furnished (+)-novoamauromine and (−)-epiamauromine.
The carbonyldicobalt-mediated alkyne/allene/CO cocyclization gives 4-alkylidenecyclopentenones as the major [2+2+1] cycloadducts. The regio- and stereoselectivities depend mainly on the substitution pattern of both the alkyne and the allenic moieties, which can be rationalized using the Magnus mechanism. However, contrary to this model, and in agreement with more recent mechanistic studies, our results
Pauson-Khand reaction with allenic compounds I: Synthesis of 4-alkylidene-2-cyclopentenones
作者:Mohammed Ahmar、Frédéric Antras、Bernard Cazes
DOI:10.1016/0040-4039(95)00735-u
日期:1995.6
The intermolecular cobalt-mediated cocyclisation of alkynes and allenes is efficiently promoted by N-methylmorpholine oxide at room temperature and leads to 4-alkylidene-2-cyclopentenones.
Selective mono- and di-allylation and allenylation of chlorosilanes using indium
作者:Zhifang Li、Chenjun Yang、Hongfang Zheng、Huayu Qiu、Guoqiao Lai
DOI:10.1016/j.jorganchem.2008.08.028
日期:2008.12
Allyl and allenyl groups have been introduced into silicon systems by the allylation and allenylation of chlorosilanes using allylbromide or propargyl bromide with indium. The allylation of chlorosilanes afforded a variety of aryl, aralkyl, and alkenyl substituted allylsilanes. By applying this method, the reactions of 1-bromo-3-methylbut-2-ene, 3-bromo-2-methylprop-1-ene and 3-bromobut-1-ene with