Heteroatom-Facilitated Lithiations of N-Methyl-N-(trimethylsilyl)methyl- benzylamine and Benzyl (Trimethylsilyl)methyl Ether with Butyllithium.
作者:Seiko MITSUI、Kiyotaka MARUMO、Sumie ANDO-INOUE、Hideo KATO、Yosiro SATO
DOI:10.1248/cpb.41.2195
日期:——
Lithiation of the Si-methyl groups of N-methyl-N-[(trimethylsilyl)methyl]benzylamine (1) occurred in preference to ortho-lithiation of the benzyl group with butyllithium in ether. In a similar reaction with benzyl (trimethylsilyl)methyl ether (7), lithiation of the benzylic position competed with that of the Si-methyl groups.
N-甲基-N-[(三甲基硅基)甲基]苄胺(1)的 Si-甲基发生的锂化比苄基与丁基锂在乙醚中发生的正锂化更优先。在与苄基(三甲基硅基)甲基醚(7)的类似反应中,苄基的锂化与硅甲基的锂化发生了竞争。