Sixteen new 7′-homo-anhydrovinblastine derivatives were prepared in one or two steps from vinorelbine by means of an original and regiospecific rearrangement and subsequent diastereoselective reduction. This strategy has allowed fast access to a family of vincaalkaloidderivatives with an enlarged and functionalized ring C′. Their synthesis and biological evaluation are reported. One compound (compound
Traceless Release of Alcohols Using Thiol-Sensitive Oxanorbornadiene Linkers
作者:Allison G. Aioub、Cody J. Higginson、M. G. Finn
DOI:10.1021/acs.orglett.8b01093
日期:2018.6.1
formation upon addition of a thiol reagent. The resulting ring-closed adducts undergo further fragmentation by retro-Diels–Alder reaction to release a furan moiety in a manner similar to oxanorbornadiene diesters. The rates of each of these fragmentation pathways in the same medium were found to be sensitive to the steric nature of the amide substituent. Alcohol release was much faster in protic solvents