STEREOSELECTIVE SYNTHESIS OF (<i>Z</i>)-KETENE SELENOTHIOACETALES VIA HYDROZIRCONATION OF LITHIUM ALKYNYLSELENOLATE ANIONS
作者:Ping Zhong、Nan-Ping Huang
DOI:10.1081/scc-100105119
日期:2001.1
Lithium alkynylselenolate anions react completely with 1.0 equiv of Cp2Zr(H)Cl in THF at room temperature to give exclusively the alpha -zirconated vinylselenolate intermediates 3, which by treatment with an alkyl halide afforded the alpha -zirconated vinyl alkylselenides intermediates 4. Reaction of 4 with alkylsulfenyl chlorides results in the formation of (Z)-ketene selenothioacetals 5 with total control of the regio- and stereochemistry.