Regioselective and Diastereoselective Amination of Polybenzyl Ethers Using Chlorosulfonyl Isocyanate: Total Syntheses of 1,4-Dideoxy-1,4-imino-<scp>d</scp>-arabinitol and (−)-Lentiginosine
作者:In Su Kim、Ok Pyo Zee、Young Hoon Jung
DOI:10.1021/ol061614x
日期:2006.8.1
The total syntheses of DAB1 (1) and (-)-lentiginosine (2) were concisely accomplished from D-lyxose via regioselective and diastereoselective NHCbz introduction using CSI, chemoselective removal of the Cbz protection, and ring-closing metathesis as key steps.
A Facile Synthesis of Lentiginosine Analogues Based on a Highly Regio- and Diastereoselective Allylic Amination Using Chlorosulfonyl Isocyanate
作者:In Su Kim、Qing Ri Li、Guang Ri Dong、Yoo Chang Kim、Yeon Ju Hong、Momi Lee、Ki-Whan Chi、Joa Sub Oh、Young Hoon Jung
DOI:10.1002/ejoc.200901443
日期:2010.3
compounds 2 and 3, was synthesized by the regio- and diastereoselectiveamination of anti-3,4-tribenzyl ether 7 usingchlorosulfonylisocyanate. The reaction of 7 with chlorosulfonylisocyanate in toluene at 0 °C afforded 6 exclusively with a diastereoselectivity of 26:1 in 84 % yield. These results can be explained by the neighboring-group effect, which leads to retention of the stereochemistry.