Benign Arylations of Dimethyl Itaconate via Heck-Matsuda Reaction Utilizing in-Situ Generated Palladium on Aluminum Oxide
作者:Lauryna Matelienė née Dauksaîtė、Jan Knaup、Frank von Horsten、Xiaoting Gu、Heiko Brunner
DOI:10.1002/ejoc.201901708
日期:2020.1.9
In‐situ generatedpalladium on aluminium oxide provides an active and efficient catalytic system for the preparation of arylmethylidene succinates using the Heck‐Matsuda reaction. Beside the monoarylation the first examples of the biarylation of these monomers will be described.
Hydrogen Bonding Makes a Difference in the Rhodium-Catalyzed Enantioselective Hydrogenation Using Monodentate Phosphoramidites
作者:Yan Liu、Christian A. Sandoval、Yoshiki Yamaguchi、Xue Zhang、Zheng Wang、Koichi Kato、Kuiling Ding
DOI:10.1021/ja063350f
日期:2006.11.1
generation of monodentate phosphoramidite ligands bearing a primary amine moiety was found to display comparable or better efficiency than bisphosphines in the Rh-catalyzed asymmetric hydrogenation of challenging substrates, such as (Z)-methyl alpha-acetoxyacrylate or (E)-beta-aryl itaconate derivatives, affording the corresponding hydrogenation products with excellent enantioselectivities (up to >99%
A phosphine-catalyzed olefinic cross-coupling between benzylhalides and fumarates is described, which affords trisubstituted alkenes in good yields and excellent E-selectivity under metal-free conditions. Mechanistic studies suggest a catalytic cycle involving phosphorus ylide formation, Michael addition, water-assisted hydrogen transfer, and phosphine elimination.
Banerjee , S.; Bagavant, G., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 5, p. 362 - 365
作者:Banerjee , S.、Bagavant, G.
DOI:——
日期:——
Unexpected Reaction of Dimethyl Acetylenedicarboxylate with in Situ Generated Arylketenes Catalyzed by 1-Methylimidazole
作者:Hanfeng Ding、Cheng Ma、Yewei Yang、Yanguang Wang
DOI:10.1021/ol050492q
日期:2005.5.1
An unexpected 1-methylimidazole-catalyzed reaction of dimethyl acetylenedicarboxylate (DMAD) with in situ generated arylketenes leading to the synthesis of dimethyl 2-arylidenesuccinates under mild conditions is described. A plausible mechanism has been proposed.