请教氨基酸上BOC的问题? 先保护羧基用bzl-oh和hcl使其形成trp-obzl,再要用z保护a氨基,比如用z-cl,氨基酸在zn的naoh溶液中,在冰盐浴冷却下滴加z-cl(1.1equiv.)同时也要滴加 2nnaoh溶液,使ph维持在9.0。室温反应1hr.。反应完毕后常规处理(想必大家都知道)。得到z-trp-obzl后再用(boc)2o(即diboc),和dmap在indole n( nm)上boc。最后用1,4-cyclo-hexadiene和pd-c分别脱除bzl和z。具体可参考文献:mun.,1699,1984 synthesis, properties, and use of n in -boc-tryptophan derivatives http:///publishing/journals/article.asp?doi=c39840001699 2.white,p.,in peptides. chemistry and biology. proceedings of the 12th american peptides symposium, smith, j.a. and rivier, j.e.,eds.,escom, leiden,1992,537 white, p. (1992) fmoc-trp(boc)-oh: a new derivative for the synthesis of peptides containing tryptophan. [此贴子已经被作者于2006-10-8 20:16:51编辑过] 查看更多