Synthesis of a (2<i>R</i>,6<i>R</i>)-2-(Hydroxymethyl)-6-propa-1,2-dienyl-2<i>H</i>-pyran-3(6<i>H</i>)-one Derivative, a New Enone for the Convergent Construction of C-Glycosides of C-Disaccharides
作者:Yao-Hua Zhu、Pierre Vogel
DOI:10.1055/s-2001-9699
日期:——
Conjugate addition of PhSAlMe2 to 16 followed by enolate trapping with 1,2-O-isopropylidene-3-O-methyl-alpha -D-xylo-pentodialdo-1,4-furanose and NaBH4 reduction of the intermediate aldol furnished a new C-glycoside of a C-disaccharide: 4,8-anhydro-9-O-[(tert-butyl)diphenylsilyl]-6-[(5R)-1,2-O-isopropylidene -3-O-methyl-alpha -D-xylo-furanos-5-C-yl]-5-S-phenyl-1,2,3,6-tetradeoxy-5-thio-D-glycero-L -gulo-none-1
以前未知的 (2R,6R)-2[(叔丁基)diphenylsilyloxyl-6-propa-1,2-dienyl-2H-pyran-3(6H) -one (16) 源自三-O-乙酰葡萄糖。PhSAlMe2 与 16 共轭加成,然后用 1,2-O-isopropylidene-3-O-methyl-alpha -D-xylo-pentodialdo-1,4-furanose 和 NaBH4 还原烯醇化物捕获中间体醛醇,提供了一个新的 C- C-二糖的糖苷:4,8-脱水-9-O-[(叔丁基)二苯基甲硅烷基]-6-[(5R)-1,2-O-异亚丙基-3-O-甲基-α-D -xylo-furanos-5-C-yl]-5-S-phenyl-1,2,3,6-tetradeoxy-5-thio-D-glycero-L -gulo-none-1,2-dienitol (24) . 类似地,将 PhMe2SiZnMe2Li