Mechanistic Evidence for a Novel Rearrangement Sequence in the Synthesis of 4-Aryl-5,6-dihydro-1,2-oxathiine-2,2-dioxides from Homopropargyl Benzosulfonates
作者:Wei Zhang、Georgia Pugh
DOI:10.1055/s-2002-25367
日期:——
reaction of homopropargyl benzosulfonates 1 initiated a novel rearrangement sequence and led to formation of two kinds of cyclic sultones: 4-aryl-5,6-dihydro-1,2-oxathiin-2,2-dioxides 2 and 4-aryl-3-tributyltin-1,2-oxathiane-2,2-dioxides 7. Isolation and X-ray structure characterization of previously unreported cyclic α-tributyltin sultones 7 provided evidence for a cyclization-fragmentation-cyclization
在类似的文献条件下,三丁基氢化锡促进苯磺酸高炔丙基酯 1 的自由基反应引发了一个新的重排序列并导致形成两种环状磺内酯:4-芳基-5,6-二氢-1,2-oxathiin-2, 2-二氧化物 2 和 4-芳基-3-三丁基锡-1,2-oxathiane-2,2-二氧化物 7. 以前未报道的环状 α-三丁基锡磺内酯 7 的分离和 X 射线结构表征为环化-断裂提供了证据-马瑟韦尔提出的环化机制。