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.