Stereoselective Synthesis and Conformational Study of Novel 2′,3′-Didehydro-2′,3′-dideoxy-4′-selenonucleosides
作者:Dilip K. Tosh、Won Jun Choi、Hea Ok Kim、Yoonji Lee、Shantanu Pal、Xiyan Hou、Jungwon Choi、Sun Choi、Lak Shin Jeong
DOI:10.1021/jo8003277
日期:2008.6.1
Stereoselective synthesis of novel 2',3'-didehydro-2',3'dideoxy-4'-selenonnucleosides (4'-seleno-d4Ns) 4a-c was accomplished via 4'-selenoribofuranosyl pyrimidines 11a-c, as key intermediates. 4'-Selenoribofuranosyl pyrimidines 11a-c were efficiently synthesized from D-ribose or D-gulonic gamma-lactone using a Pummerer-type condensation as a key step. Introduction of 2',3'-double bond was achieved by treating cyclic 2',3'-thiocarbonate with 1,3-dimethyl-2-phenyl-1,3,2-diazaphospholidine.