Ligand‐Controlled Regiodivergent Thiocarbonylation of Alkynes toward Linear and Branched α,β‐Unsaturated Thioesters
作者:Han‐Jun Ai、Wangyang Lu、Xiao‐Feng Wu
DOI:10.1002/anie.202106079
日期:2021.7.26
the synthesis of unsaturated thioesters. A robust ligand-controlled regioselective thiocarbonylation of alkynes is developed. Utilizing boronic acid and 5-chlorosalicylic acid as the acid additive to in situ form 5-chloroborosalicylic acid (5-Cl-BSA), and bis(2-diphenylphosphinophenyl)ether (DPEphos) as the ligand, linear α,β-unsaturated thioesters were produced in a straightforward manner. Switching
炔烃的硫羰基化为合成不饱和硫酯提供了理想的方法。开发了一种强大的配体控制的炔烃区域选择性硫代羰基化。以硼酸和5-氯水杨酸为酸添加剂,原位生成5-氯硼水杨酸(5-Cl-BSA),双(2-二苯基膦基苯基)醚(DPEphos)为配体的线性α,β-不饱和硫酯以直接的方式生产。将配体切换为三(2-呋喃基)膦可以改变反应选择性,得到支化产物。值得注意的是,这种方法也代表了内部炔烃的硫代羰基化的第一个例子。