Amino-Acid-Derived Amides as Stereodirecting Leaving Groups for Ferrier Rearrangement via Pd(0)-Catalyzed Tsuji–Trost Reactions
作者:Pradip Das、Rima Thakur
DOI:10.1021/acs.orglett.3c02226
日期:2023.8.18
Ferrier rearrangement on glycals is an efficient tool to form 2,3-dideoxy glycosides that provide access to various sugar derivatives through olefin functionalization. The classical acid-mediated transformation delivers the α-O-glycosides selectively. In this protocol, amides obtained from amino acids, glycine and proline, have been utilized as sustainable β-directing leaving groups on glycal substrates
糖醛上的费里尔重排是形成 2,3-二脱氧糖苷的有效工具,可通过烯烃官能化获得各种糖衍生物。经典的酸介导转化选择性地传递 α- O-糖苷。在该方案中,从氨基酸、甘氨酸和脯氨酸获得的酰胺已被用作糖基底物上可持续的β-导向离去基团。定向基团通过 Pd(0) 催化的 Tsuji-Trost 内球途径促进硬醇亲核试剂的 β-选择性 Ferrier 重排。