β-(Carbonatoxy)alkyl radicals: a new subset of β-(ester)alkyl radical fragmentation during copper(I)-mediated synthesis of 1,1-dichloro-1-alkenes
作者:Ram N. Ram、Ram K. Tittal
DOI:10.1016/j.tetlet.2014.05.097
日期:2014.7
A new subset of β-(ester)alkyl radicals is presented. It is the first study on the chemistry of β-(alkoxycarbonyloxy)alkyl radicals that fill the gap in the spectrum of the migrating groups in β-(ester)alkyl radical reactions. The change from less nucleofugal (acetate) group to the more nucleofugal (carbonate) group in the spectrum of the migrating group changed the reaction path from rearrangement
提出了一个新的β-(酯)烷基自由基子集。这是对填充β-(酯)烷基自由基反应中迁移基团谱中间隙的β-(烷氧基羰基氧基)烷基自由基化学性质的首次研究。在迁移基团的光谱中,从较少的核真菌(乙酸盐)基团变为较高的核真菌(碳酸酯)基团的变化将反应路径从重排改变为片段化。该方法已用于高产率地合成1,1-二氯烯烃。二氯烯烃的形成是由于C的杂解导致烯烃自由基阳离子和碳酸根阴离子对(A CIP)的参与在β-(烷氧基羰氧基)烷基的β-位的碳酸酯的O键。通过与MeOH的亲核反应捕获烯基自由基阳离子以形成甲酯。