Intramolecular cyclizations of orgamometallic compounds IV. Heteroatom influence on cyclizations of organolithium compounds
作者:Michael J. Smith、Stanley E. Wilson
DOI:10.1016/s0040-4039(01)82995-6
日期:1981.1
Alkoxyl groups in alkenyllithiums can influence the stereochemistry of cyclization. The presence of n-butyllithium increases the stereoselectivity such that only one stereochemistry results; the presence of TMEDA negates the heteroatom's influence so that only the other stereochemistry results. Yields are 33% to 44%.
烯基锂中的烷氧基可影响环化的立体化学。正丁基锂的存在增加了立体选择性,使得仅产生一种立体化学;反之,TMEDA的存在消除了杂原子的影响,因此仅产生其他立体化学。产率为33%至44%。