Ene Reductase-Catalysed Synthesis of (R)-Profen Derivatives
作者:Jörg Pietruszka、Melanie Schölzel
DOI:10.1002/adsc.201100743
日期:2012.3
Enantiomerically pure (R)‐profen derivatives and intermediates are synthesised utilising the enzyme YqjM, an ene reductase from Bacillus subtilis. After optimisation of the reaction conditions, the chemoenzymatic approach was applied for the first time in the synthesis of (R)‐flurbiprofen methyl ester.
Efficient Synthesis of Spirooxindole Pyrrolones by a Rhodium(III)‐Catalyzed C−H Activation/Carbene Insertion/Lossen Rearrangement Sequence
作者:Biao Ma、Peng Wu、Xing Wang、Zhengyu Wang、Hai‐Xia Lin、Hui‐Xiong Dai
DOI:10.1002/anie.201906589
日期:2019.9.16
A rhodium(III)-catalyzed domino annulation of simple olefins with diazo oxindoles to give spirooxindole pyrrolone products is described. This reaction can be formally viewed as the result of an anomalous tandem C-H activation, carbene insertion, Lossen rearrangement, and a nucleophilic addition process. The potential utility of this reaction was further demonstrated by the late-stage diversification
dialkoxycarbonylation of various aromatic and aliphatic alkynes affording a wide range of 1,4-dicarboxylic acid diesters in high yields and selectivities. Kinetic studies suggest the generation of 1,4-dicarboxylic acid diesters via cascade hydroesterification of the corresponding alkynes. Based on these investigations, the chemo- and regioselectivities of alkyne carbonylations can be controlled as shown by switching
One-pot catalysis of dehydrogenation of cyclohexanones to phenols and oxidative Heck coupling: expedient synthesis of coumarins
作者:Donghee Kim、Minsik Min、Sungwoo Hong
DOI:10.1039/c3cc41296b
日期:——
One-pot reactions leading to highly functionalized coumarins have been developed via a Pd(II)-catalyzed dehydrogenation-oxidative Heck-cyclization process.
通过Pd(II)催化的脱氢-氧化Heck环化过程已经开发出了导致高度功能化香豆素的一锅法反应。
Room-temperature Pd-catalyzed methoxycarbonylation of terminal alkynes with high branched selectivity enabled by bisphosphine-picolinamide ligand