Free radical fragmentation of photoadduct derivatives leading to allylic systems. Regioselectivity of reduction with tin hydrides and samarium (II) iodide
作者:Gordon L. Lange、Christine Gottardo
DOI:10.1016/s0040-4039(00)73447-2
日期:1994.9
Fragmentation of unsaturated photoadduct derivatives 5 and 8 with (n-Bu)3SnH, (C6H5)3SnH or SmI2 generally gives mixtures of regioisomers. SmI2 is the reagent of choice for these transformations because the yields are high (90%) and with esters 8a/b only one isomer, 11a/b, is obtained.