Stereoselective synthesis of a C-glycosylic compound (a “methyl C-glycoside”) through a regioselective free-radical ring-opening reaction. A single-crystal X-ray structure determination
作者:Bhagavathy Shanmugasundaram、Babu Varghese、Kalpattu K Balasubramanian
DOI:10.1016/s0008-6215(02)00137-4
日期:2002.9
7-O-benzylidene-1,3,4-trideoxy-D-arabino-hept-3-enitol, a methyl C-glycosylic compound. Cyclopropanation of 4,6-O-benzylidene-D-glucal, followed by tributylstannyl radical-mediated regioselective ring opening of the 1,2-cyclopropano sugar led to a 2,6-anhydro-1-deoxyheptose, (a "methyl C-beta-D-glycoside"). The stereochemistry of the 1,2-cyclopropano sugar and the "methyl C-glycoside" were confirmed by single-crystal
将现成的3,4,6-三-O-乙酰基-D-葡萄糖转化为2,6-脱水-5,7-O-亚苄基-1,3,4-三苯氧基-D-阿拉伯糖-庚-3-烯醇,一种甲基C-糖基化合物。4,6-O-亚苄基-D-葡糖的环丙烷化,然后由三丁基锡烷基自由基介导的1,2-环丙糖的区域选择性开环导致2,6-脱水-1-脱氧庚糖(“甲基C- β-D-糖苷”)。通过单晶X射线衍射研究证实了1,2-环丙糖和“甲基C-糖苷”的立体化学。