silanes using D2O as an inexpensive, readily available, and easy to handle deuterium source. A broad range of aryl- and alkyl-substituted silanes were deuterated with high deuterium incorporations and yields. Furthermore, a 100 gram-scale synthesis was demonstrated using continuous-flow micro-tubing reactors, where enhanced reaction efficiency was obtained. The photoredox-catalyzed polarity matched hydrogen
同位素标记的化合物非常受欢迎,因为它们既可以用作化学中的机械探针,也可以用作医学研究中的诊断工具。在此,我们报告了一种前所未有的可见光介导的无金属硅烷氘化,使用 D 2 O 作为廉价、容易获得且易于处理的氘源。对多种芳基和烷基取代的硅烷进行氘化,具有高氘掺入量和产率。此外,使用连续流微管反应器演示了 100 克规模的合成,提高了反应效率。硅烷和硫醇 HAT 催化剂之间光氧化还原催化的极性匹配氢原子转移 (HAT) 负责高效氘化。
Synthesis of 11-<i>cis</i>-Retinoids by Hydrosilylation-Protodesilylation of an 11,12-Didehydro Precursor: Easy Access to 11- and 12-Mono- and 11,12-Dideuteroretinoids
An expeditious, highly efficient approach to 11‐cis‐retinoids was achieved by semihydrogenation of a readily available 11‐yne precursor through a hydrosilylation–protodesilylation protocol. The complete chemo‐, regio‐, and syn‐stereoselectivity of the method also allowed direct access to 11‐ and 12‐monodeutero‐, and 11,12‐dideutero‐11‐cis‐retinoids. The analogous trans series was not accessible by