Chiron approach for the synthesis of (5RS)-Hagen’s gland lactones from diacetone-d-mannose
作者:Geetha Banda、I.E. Chakravarthy
DOI:10.1016/j.tetasy.2006.06.012
日期:2006.7
A new and convergent synthetic route for (5RS)-Hagen’s lactones 1–4 is described, starting from bisacetonide mannofuranolactone 5. The key transformations in the synthesis are SmI2 mediated α-deoxygenation of a aldonolactone to 2-deoxy lactone, Pd(II) mediated oxidative cyclization and an oxidation of tetrahydrofuran to a furanone.
为一个新的和会聚的合成路线(5个RS)-Hagen的内酯1 - 4中描述了从二缩丙酮mannofuranolactone开始5。合成过程中的关键转变是SmI 2介导的醛糖内酯的α-脱氧为2-脱氧内酯,Pd(II)介导的氧化环化和四氢呋喃的氧化为呋喃酮。