作者:Manfred Schlosser、Hervé Geneste
DOI:10.1016/s0040-4020(98)00602-4
日期:1998.8
Under carefully established conditions, the metal occupying the latter ortho position can be selectively replaced by an electrophile. In general, it is however more convenient and also more efficacious to protect the acetylenic site by silylation. Then lithium may be introduced into the double-ortho position either by hydrogen/metal or by halogen/metal exchange, using 2-bromo-N-methyl-N-[(3-trimethyls
N-甲基-N-(2-丙炔基)哌啶胺可在末端炔基和在侧链和氧原子两侧的那个芳族位置同时被锂化。在精心建立的条件下,可以用亲电子试剂选择性地取代占据后者邻位的金属。然而,通常,通过甲硅烷基化保护炔位点更方便也更有效。然后可以使用2-溴-N-甲基-N -[(3-三甲基甲硅烷基)-2-丙炔基]哌啶胺通过氢/金属或卤素/金属交换将锂引入双邻位。在后一种情况下。新产品之一(1b)被证明是强单胺氧化酶(MAO)抑制剂。