Synthesis of <i>C</i>-Glycosyl Lactones and Protected <i>C</i>-Glycosyl Amino Acids: Use of Radical Cyclization
作者:Junhu Zhang、Derrick L. J. Clive
DOI:10.1021/jo981435w
日期:1999.2.1
halogen on the adjacent carbon, were condensed with (2,2-diphenylhydrazono)acetic acid (2); the resulting esters undergo radical cyclization to afford carbohydrates fused to a 2,2-diphenylhydrazino lactone unit (6c,d-13c,d). In suitable cases (9c,d) such carbohydrate lactones can be elaborated into C-glycosyl amino acids.
将保护的碳水化合物6a-13a与(2,2-二苯基肼基)乙酸(2)缩合,所述保护的碳水化合物6a-13a在相邻的碳上具有一个游离羟基和苯基硒烯基或卤素。所得酯进行自由基环化,得到与2,2-二苯基肼基内酯单元(6c,d-13c,d)融合的碳水化合物。在合适的情况下(9c,d),这种碳水化合物内酯可以被精加工成C-糖基氨基酸。