A Serendipitous Discovery of a New <i>C</i>-Furanosyl Glycine Synthesis via Thiazole-Based Aminohomologation of Hexopyranoses
作者:Alessandro Dondoni、Alessandro Massi、Andrea Nuzzi
DOI:10.1055/s-2007-967993
日期:2007.2
Ring closure via microwave-assisted intramolecular OMs displacement by a γ-OBn group (O-nucleophilic attack) in protected polyhydroxylated N-Boc-thiazolylalkyl amines afforded C-furanosides (37-81%) featuring a chiral thiazolylmethylamino side chain, which, upon thiazole to carboxylate (through aldehyde) transformation, furnished enantiopure C-furanosyl glycines.
通过微波辅助的分子内γ-OBn基团(O-亲核攻击)的OMs位移反应,在保护的多羟基N-Boc-噻唑基烷基胺中实现了环合反应,得到了带有手性噻唑基甲氨基侧链的C-呋喃糖苷(产率37-81%)。这些化合物经过噻唑到羧酸酯(通过醛)的转化,提供了手性纯的C-呋喃糖基甘氨酸。