Selective derivatization of d-galactose towards a practical synthesis of C-6 l-fucose analogues
作者:Rui C. Pinto、Marta M. Andrade、Maria Teresa Barros
DOI:10.1016/j.tetlet.2012.08.127
日期:2012.12
Starting from d-galactose, a convenient protocol is described for the synthesis of l-fucose C-6 analogue, 2,3,4,5-tetra-O-acetyl-5-(1,3-dithiolan-2-yl)-l-galactopyranose, in an overall yield of 40% after 6 steps, making use of stable intermediates. A chemoselective protection/deprotection strategy was studied using TBDMS and TBDPS silyl ethers for protection of d-galactose primary hydroxyl group.
从d-半乳糖开始,描述了用于合成1-岩藻糖C-6类似物2,3,4,5-四-O-乙酰基-5-(1,3-二硫代木兰-2-基)的便捷方案-l-吡喃半乳糖,使用稳定的中间体,经过6个步骤,总收率为40%。研究了使用TBDMS和TBDPS甲硅烷基醚保护d-半乳糖伯羟基的化学选择性保护/脱保护策略。