A series of C-terminus capped dipeptides and tripeptides was synthesized as growth hormone (GH) secretagogues. Among them, tripeptide Aib-D-Trp-D-homoPhe-OEt showed low nanomolar activity in the rat pituitary assay. Thus, we have demonstrated that the GH secretagogue activity of the hexa- hepta-GH releasing peptides can be mimicked at the tripeptide level. (C) 1998 Elsevier Science Ltd. All rights reserved.
Method For Asymmetric Alkynylation Of Al Pha-Imino Esters
申请人:Chan Albert Sun-Chi
公开号:US20080183010A1
公开(公告)日:2008-07-31
Method for the preparation of asymmetric alkynylated α-amino esters of the formula
wherein R
1
and R
2
are independently optionally substituted alkyl cycloalkyl, aryl or heteroaryl, and Y is hydrogen or a nitrogen protecting group.