Highly general stereo-, regio-, and chemo-selective synthesis of terminal and internal conjugated enynes by the Pd-catalysed reaction of alkynylzinc reagents with alkenyl halides
作者:Anthony O. King、Nobuhisa Okukado、Ei-ichi Negishi
DOI:10.1039/c39770000683
日期:——
The reaction of an alkynylzinc chloride, readily obtainable from the corresponding alkynyl-lithium and anhydrous zinc chloride, with an alkenyl iodide or bromide in the presence of a catalytic amount of a Pd–phosphine complex provides the corresponding terminal or internal enyne in high yield, the stereospecificity of the reaction being 97%.
Manganese-Catalyzed Cross-Coupling Reaction between Aryl Grignard Reagents and Alkenyl Halides
作者:Gérard Cahiez、Olivier Gager、Fabien Lecomte
DOI:10.1021/ol802273e
日期:2008.11.20
Aryl Grignard reagents react stereospecifically with alkenylhalides in the presence of manganese chloride (10%) to afford good yields of cross-coupling products.
Substitution of vinylic iodides by various copper(I) and copper(II) derivatives
作者:A. Commercon、J. Normant、J. Villieras
DOI:10.1016/s0022-328x(00)94014-2
日期:1975.7
Vinyl iodides have been treated with various copper(I) derivatives (aryl- and alkyl-copper derivatives, copper(I) chloride, cyanide, bromide, thiolate) and found to undergo substitution at carbon with retention of configuration. Copper(II) carboxylates give much better yields of enol esters than the corresponding copper(I) salts. A four centre mechanism accounts best for the results.
addition of alkylcopper compounds to 1-alkynes, are transformed with retention to various ethylenic structures; 1-deutero-1-alkenes, symmetrical conjugated dienes, 1-iodo-1-alkenes, di- or tri-substituted alkenes and primary or secondary allylic alcohols.