Radical Deuteration with D<sub>2</sub>O: Catalysis and Mechanistic Insights
作者:Valentin Soulard、Giorgio Villa、Denis Patrick Vollmar、Philippe Renaud
DOI:10.1021/jacs.7b12105
日期:2018.1.10
Selective incorporation of deuterium atoms into molecules is of high interest for labeling purposes and for optimizing properties of drug candidates. A mild and environmentally benign method for the deuteration of alkyl iodides via radical pathway using D2O as source of deuterium has been developed. The reaction is initiated and mediated by triethylborane in the presence of dodecanethiol as a catalyst
Deoxygenation of Alcohols Employing Water as the Hydrogen Atom Source
作者:David A. Spiegel、Kenneth B. Wiberg、Laura N. Schacherer、Matthew R. Medeiros、John L. Wood
DOI:10.1021/ja052185l
日期:2005.9.1
Trialkylboranes (BMe3, BEt3, and BBu3) have been shown to mediate reductive deoxygenation reactions of O-alkyl-S-methyl dithiocarbonates (methyl xanthates) in which water or deuterium oxide functions as the source of hydrogen or deuterium. This method has proven versatile with regard to substrate scope and is capable of providing protio- or deuterioalkane products in high yields with excellent levels
三烷基硼烷(BMe3、BEt3 和 BBu3)已被证明可介导 O-烷基-S-甲基二硫代碳酸酯(甲基黄原酸盐)的还原脱氧反应,其中水或氧化氘充当氢或氘的来源。该方法在底物范围方面已被证明是通用的,并且能够以高产率提供具有优异 D 掺入水平的质子或氘代烷烃产品。从头算计算表明,三烷基硼烷-水复合物具有异常低的 OH 键解离能 (73 kcal/mol),并支持该过程的自由基链机制。总之,本报告为水和三烷基硼烷在理论和应用研究中具有广泛重要性的根本新颖和以前被忽视的反应模式提供了证据。