Palladium-catalyzed cyclization of alkenyl and aryl halides containing α, β-Unsaturated carbonyl groups via intramolecular carbopalladation
作者:Brian O'Connor、Yantao Zhang、Ei-ichi Negishi、Fen-Tair Luo、Jya-Wei Cheng
DOI:10.1016/s0040-4039(00)80376-7
日期:1988.1
Treatment of alkenyl and aryl iodides and bromides containing an appropriate α, β-unsaturated carbonyl group with a catalytic amount (3–5 mol %) of either a Pd(O) or a Pd(II) complex, e.g., Pd(PPh3)4, and a base, e.g., NEt3, can induce highly regioselective cyclization via intramolecular carbopalladation; formation of exocyclic alkenes can also be highly stereoselective.
处理含有适当的α,β-不饱和羰基的烯基和芳基碘化物和溴化物,其催化量为(3-5mol%)Pd(O)或Pd(II)络合物,例如Pd(PPh 3))4,和碱,例如网3,可以诱导通过分子内carbopalladation高度选择性环化; 外环烯烃的形成也可以是高度立体选择性的。