作者:Adrian Scaffidi、Brian W. Skelton、Robert V. Stick、Allan H. White
DOI:10.1071/ch04015
日期:——
Various carbohydrate ketones (uloses) have been treated with chloroform under strongly basic conditions to yield trichloromethyl tertiary alcohols. These alcohols, when subjected to the conditions of the modified Corey–Link reaction (sodium azide and 1,8-diazabicyclo[5.4.0]undec-7-ene in methanol), generally gave the expected azido ester with complete stereocontrol. Subsequent transformations on these
已在强碱性条件下用氯仿处理各种碳水化合物酮(乌洛糖)以产生三氯甲基叔醇。这些醇在经受改进的 Corey-Link 反应条件(叠氮化钠和甲醇中的 1,8-二氮杂双环[5.4.0] undec-7-ene)条件下,通常会产生具有完全立体控制的预期叠氮基酯。这些叠氮基酯的后续转化提供了氨基酯、叠氮基酸,在一种情况下还提供了氨基酸。应用于受保护的 d-glucono-1,5-lactone 的类似序列仅部分成功。据报道 1,2:5,6-di-O-isopropylidene-3-C-trichloromethyl 的单晶 X 射线结构-α-d-阿洛糖,(3S)-3-C-azido-3-C-carboxy-3-deoxy-1,2:5,6-di-O-isopropylidene-α-d-ribo-hexose, 1 ,2:5,6-di-O-cyclohexylidene-3-C-trichloromethyl-α-d-gulose