Palladium/Rhodium Cooperative Catalysis for the Production of Aryl Aldehydes and Their Deuterated Analogues Using the Water–Gas Shift Reaction
作者:Malek Y. S. Ibrahim、Scott E. Denmark
DOI:10.1002/anie.201806148
日期:2018.8.6
to effect the reductive carbonylation of arylhalides in moderate to good yield. In this reaction, water is the hydride source, and CO serves both as the carbonyl source and the terminal reductant through the water–gas shift reaction. The catalytic generation of the Rh hydride allows for the selective formation of highly hindered aryl aldehydes that are inaccessible through previously reported reductive
Mesoionic Carbene (MIC)-Catalyzed H/D Exchange at Formyl Groups
作者:Wei Liu、Liang-Liang Zhao、Mohand Melaimi、Lei Cao、Xingyu Xu、Jean Bouffard、Guy Bertrand、Xiaoyu Yan
DOI:10.1016/j.chempr.2019.08.011
日期:2019.9
exchange at formyl groups is the most direct approach for the synthesis of deuterated aldehydes. Platinum-group metal complexes have been employed to catalyze this transformation, with significant substrate scope limitations. Although N-heterocyclic carbenes can also activate the C–Hbond of aldehydes through the formation of Breslow intermediates, benzoin condensation and other C–C-bond-forming pathways
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.