作者:Zhongbo Fei、Quanbing Wu、Fei Zhang、Yudong Cao、Chuanqin Liu、Wen-Chung Shieh、Song Xue、Joe McKenna、Kapa Prasad、Mahavir Prashad、Daniel Baeschlin、Kenji Namoto
DOI:10.1021/jo801830x
日期:2008.11.21
A practical synthetic strategy to a chiral azabicycclooctanyl derivative (1), a potent DPP-4 inhibitor, starting from a commercially available nortropine is described. The stereogenic center of 1 was established employing a modified protocol of Ellman's diastereoselective addition of a benzylic nucleophile to tert-butanesulfinimme. Other key steps include Corey-Chaykovsky reaction, Meinwald rearrangement, and CDMT-promoted amide bond formation involving a sterically hindered amine 2.