Nickel catalyzed tellurium-zine exchange reactions. A new preparation of arylzinc reagents
作者:Thomas Stüdemann、Vijay Gupta、Lars Engman、Paul Knochel
DOI:10.1016/s0040-4039(96)02482-3
日期:1997.2
presence of catalytic amounts of Ni(acac)2 (5–10 mmol %) leading to arylzinc derivatives 1. The reaction can be extended to the preparation of alkylzinc compounds and allows a stereoselective cyclization to a 2,4-disubstituted tetrahydrofuran by a radical ring closure of an unsaturated telluride.
在催化量的Ni(acac)2(5-10 mmol%)存在的情况下,二芳基碲化物2和二芳基二碲化物3经历平稳的碲-锌交换反应,从而生成芳基锌衍生物1。该反应可以扩展到烷基锌化合物的制备,并且可以通过不饱和碲化物的自由基闭环将立体选择性环化为2,4-二取代的四氢呋喃。