A powerful electrochemical protocol that enables the first dicarboxylation of unactivated skipped dienes with CO2 is reported. Various valuable tethered adipic acids are formed in moderate-to-good yields under mild conditions, showing great potential in synthetic, medicinal and polymer chemistry.
报道了一种强大的电化学方案,该方案能够使未活化的跳过二烯与 CO 2进行首次双羧化。在温和条件下以中等到良好的产率形成各种有价值的系链己二酸,在合成、医药和高分子化学方面显示出巨大的潜力。
Quantitating the Effect of an Ortho Substituent on Cyclization and Intramolecular Hydrogen-Transfer Reactions of Aryl Radicals
作者:Dennis P. Curran、Neil Fairweather
DOI:10.1021/jo0268759
日期:2003.4.1
Reduction of allyl 2-iodobenzyl malonates with triphenyltinhydrides generates aryl radicals that partition between 6-exo cyclization, 7-endo cyclization, and 1,5-hydrogen atom transfer. Rate constants for all of these processes are high (>10(8) M(-)(1) s(-)(1)), and the rates are only marginally reduced (<33%) by the introduction of methyl group ortho to the reacting radical.