作者:Federica Pisaneschi、Michela Piacenti、Franca M. Cordero、Alberto Brandi
DOI:10.1016/j.tetasy.2005.12.003
日期:2006.1
A general approach to 1,6,7-trihydroxyindolizidin-8-carboxylates is illustrated through the synthesis of a 7-lactone in an enantiopure form in seven steps starting from (3S)-3-t-butyloxy-1-pyrroline N-oxide and the acetonide of (2E,4S)-4,5-dihydroxy-2-pentenoic acid derived from (S)-malic acid and mannitol, respectively. The process was completely stereoselective and allowed the total control of the relative and absolute configuration of the five contiguous stereocentres of the product. (c) 2005 Elsevier Ltd. All rights reserved.