Novel and convergent synthesis of modified glycosphingolipids, galactosyl-5-aza-sphinganines, by a diversity-oriented method
作者:Bimalendu Roy、Salim Ferdjani、Charles Tellier、Claude Rabiller
DOI:10.1016/j.tet.2011.05.054
日期:2011.7
stereocontrolled synthesis of β-galactosyl-5-aza-sphinganines was accomplished with high efficiency by a novel and convergent strategy. The truncated β-galactosphinganine 5 was easily acylated with different long chains. Moreover, the simple conversion of thiazole to formyl enabled 5-aza-alkylchains to be introduced via an amino-reduction reaction. The overall yield for the synthesis of β-galacto-5-aza-sphinganines
通过一种新颖且收敛的策略,高效完成了β-半乳糖基-5-氮杂-神经鞘氨醇的立体控制合成。截短的β-半乳糖基神经嘌呤5容易被不同的长链酰化。此外,噻唑向甲酰基的简单转化使得能够经由氨基还原反应引入5-氮杂-烷基链。从5开始,合成β-半乳清5-氮杂-神经鞘氨醇9和13的总产率约为30-35%。还提出并讨论了有关由半乳糖苷酶催化的截短的狮身gan碱的β-反式半乳糖基化的初步结果。