Allyloxy and Propargyloxy Group Migration: Role of Remote Group Participation in the Synthesis of 5-C-Nucleosides and Other Sugar Derivatives
作者:Subhrangshu Mukherjee、Prabhash N. Tripathi、Sukhendu B. Mandal
DOI:10.1021/ol301851q
日期:2012.8.17
In 1-deoxy-xylofuranose derivatives possessing a good leaving group at 2-C, participation of allyloxy and propargyloxy substituents at 5-C results in loss of the 2-C substituent and attack of various nucleophiles at 5-C of the oxonium intermediate. Such participation of a benzyloxy or crotyloxy group leads to dioxabicyclo[2.2.1]heptane rings.
在2-C处具有良好离去基团的1-脱氧-木呋喃糖衍生物中,烯丙基氧基和炔丙基氧基取代基在5-C处的参与导致2-C取代基的丢失和各种亲核试剂在氧中间体的5-C处的进攻。苄氧基或巴豆氧基的这种参与导致二氧杂双环[2.2.1]庚烷环。