Nickel-Catalyzed Chemo- and Stereoselective Alkenylative Cyclization of 1,6-Enynes with Alkenyl Boronic Acids
作者:Chun-Ming Yang、Subramaniyan Mannathan、Chien-Hong Cheng
DOI:10.1002/chem.201302180
日期:2013.9.9
Discover nickel! A nickel‐catalyzed alkenylative cyclization of 1,6‐enynes and alkenyl boronic acids affording substituted pyrrolidines and dihydrofurans is described (see scheme; cod=1,5‐cyclooctadiene, Ts = p‐toluene sulfonate). The reaction is highly chemo‐ and stereoselective. A possible reaction mechanism involving a nickelacyclopentene intermediate is proposed.
发现镍!描述了镍催化的1,6-炔烃和烯基硼酸的烯基化环化反应,提供了取代的吡咯烷和二氢呋喃(参见示意图; cod = 1,5-环辛二烯,Ts = 对甲苯磺酸盐)。该反应是高度化学和立体选择性的。提出了一种可能的反应机理,涉及镍环戊烯中间体。