Frustrated Lewis pairs: A real alternative to deuteride/tritide reductions
作者:Sabina Doubková、Aleš Marek
DOI:10.1002/jlcr.3774
日期:2019.9
suffers from low functional group tolerances, poor selectivity, tricky or multistep synthesis of reagents, and low specific activity of the labeled product. Herein, we demonstrate a mild and non-metallic technique of deuteration and tritiation of polarized double bonds, such as carbonyl compounds, yielding labeled alcohols of high specific activities. This, one pot synthesis uses carrier-free hydrogen
Synthesis of optically active benzyl-α-d alcohols by asymmetric hydrogenation of benzaldehyde-α- d and its derivatives catalysed by BINAP-Ru(II) complexes
作者:Tetsuo Ohta、Takaharu Tsutsumi、Hidemasa Takaya
DOI:10.1016/0022-328x(94)87204-x
日期:1994.12
Opticallyactive benzyl-α-d alcohols have been synthesized in up to 89% ee by asymmetric hydrogenation of benzaldehyde-α-d and its derivatives catalysed by BINAP-Ru(II) complexes. A remarkable enhancement in enantioselectivities has been observed for o-bromo- and o- methoxy-benzaldehyde-d, but moderate enantioselectivities for o-methyl and other m- and p-substituted derivatives.
One-Pot Synthesis of Quinazolin-4(3<i>H</i>)-ones through Anodic Oxidation and the Related Mechanistic Studies
作者:Liu Cao、Hengrui Huo、Haipeng Zeng、Yu Yu、Dengfu Lu、Yuefa Gong
DOI:10.1002/adsc.201800927
日期:2018.12.21
A metal‐free and oxidant‐free method for the one‐pot preparation of quinazolin‐4(3H)‐ones enabled by electrochemical oxidation is described. Together with 2‐aminobenzamides, a variety of aldehydes were successfully applied to an acid‐catalyzed annulation and direct anodic oxidation cascade, affording structurally diverse quinazoline‐4(3H)‐ones in good to excellent yields. Additionally, certain alcohols
The selectiveoxidation of alcohol-d1 to prepare aldehyde-d1 was newly developed by means of NaBD4 reduction/activated MnO2 oxidation. Various aldehyde-d1 derivatives including aromatic and unsaturated aldehyde-d1 can be prepared with a high deuterium incorporation ratio (up to 98% D). Halogens (chloride, bromide, and iodide), alkene, alkyne, ester, nitro, and cyano groups in the substrates are tolerated