Variant G74C of arylmalonatedecarboxylase (AMDase) from Bordatella bronchoseptica has a unique racemising activity towards profens. By protein engineering, variant G74C/V43A with a 20‐fold shift towards promiscuous racemisation was obtained, based on a reduced activity in the decarboxylation reaction and a two‐fold increase in the racemisation activity. The mutant showed an extended substrate range
Nouvelle méthode de préparation d'éthers vinyliques à partir d'acétals
作者:Francis Barbot、Philippe Miginiac
DOI:10.1002/hlca.19790620509
日期:1979.7.17
A new way to vinylic ethers from acetals
缩醛制乙烯醚的新方法
Direct Vinylogous Mannich-Type Reactions via Ring Opening and Rearrangement of Vinyloxiranes
作者:Mark Lautens、Eiji Tayama、Duy Nguyen
DOI:10.1021/ol036153j
日期:2004.2.1
2-methyl-2-vinyloxirane as a masked dienolate has been successfully demonstrated in the direct vinylogous Mannich-type reaction with an alpha-imino ester as an electrophile. The Mannich adduct was a useful intermediate en route to cis-5-substituted pipecolinic acid ethyl ester under simple hydrogenation conditions.
Toward the Rhodium-Catalyzed Bis-Hydroformylation of 1,3-Butadiene to Adipic Aldehyde
作者:Stuart E. Smith、Tobias Rosendahl、Peter Hofmann
DOI:10.1021/om200334g
日期:2011.7.11
of all of these reaction parameters, except for ligand structure. However, the reaction parameters do have a substantial effect on the selectivity for the products, resulting from the branched addition of the rhodiumhydride to the carbon–carbon double bond. The optimum reaction parameters and ligand have resulted in a so far unprecedented maximum selectivity of 50% for adipic aldehyde.