alkynes with low-valent tantalum derived from TaCl5 and zinc produces tantalum-alkyne complexes (not isolated), which react with phenylisocyanate (or butylisocyanate) to give (E)-α,β-unsaturated amides stereoselectively.
用源自 TaCl5 和
锌的低价
钽处理
炔烃会产生
钽-
炔烃配合物(未分离),其与
异氰酸苯酯(或异
氰酸丁酯)反应生成 (E)-α,β-不饱和酰胺立体选择性。