Addition of polyfunctional and pure (E or Z) alkenylcopper and arylcopper compounds to alkylidenemalonates
作者:G�rard Cahiez、Patricia Venegas、Charles E. Tucker、Tahir N. Majid、Paul Knochel
DOI:10.1039/c39920001406
日期:——
Polyfunctional and stereochemically pure (E) or (Z) alkenylcopper reagents have been generated by carbocupration of terminal alkynes or by an iodine–lithium exchange reaction and have been found to add to various diethyl alkylidenemalonates, affording γ,δ-unsaturated esters in excellent yields.
多功能且立体化学纯的 (E) 或 (Z) 烯基铜试剂通过端炔的碳铜化反应或碘-锂交换反应生成,并被发现能够与多种二乙基烯基美克酸酯发生加成反应,获得 γ,δ-不饱和酯,产率极高。