Nucleosides and nucleotides. 191
作者:Makoto Nomura、Kanji Endo、Satoshi Shuto、Akira Matsuda
DOI:10.1016/s0040-4020(99)00968-0
日期:1999.12
treated with (methylene)triphenylphosphorane in THF, an unusual ring-expansion reaction occurred to give a nucleoside (7) containing dihydrooxepine ring at the sugar moiety. A deuterium-label experiment showed that one carbon unit derived from the ylide was incorporated into the 5'-position of 7. A ring cleavage between the C-3' and C-4' of 5 during the reaction was suggested.
当将1- [2,3,5-三-O -TBS-4α-甲酰基-β-D-核糖-戊呋喃糖基]尿嘧啶(5)在THF中用(亚甲基)三苯基磷烷处理时,发生异常的扩环反应。得到在糖部分含有二氢氧杂环丁烷环的核苷(7)。氘标记实验表明,来自叶立德的一个碳单元被掺入7的5'位置。建议在反应过程中C-3'和C-4'之间的环断裂为5。