Formation of<i>meta</i>-Substituted Phenols by Transition Metal-Free Aromatization: Use of 2-Bromocyclohex-2-en-1-ones
作者:Guojun Yu、Derrick L. J. Clive
DOI:10.1021/acs.joc.6b01653
日期:2016.9.16
or other organometallic reagents to 2-halocyclohex-2-en-1-ones bearing an alkyl or aryl group at C-5, followed by mild acid treatment and exposure to 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) at room temperature, generates meta-substituted phenols in which the newly introduced meta substituent originates from the Grignard reagent. The range of effective organometallic reagents includes alkyl, allyl,
of enantioenriched (hetero)aromatic secondary allylic alcohols has been synthesized through deracemization of the corresponding racemic mixtures combining a non-selective chemoenzymatic oxidation (laccase from Trametes versicolor and oxy-radical TEMPO) and a stereoselective biocatalyzed reduction (lyophilized cells of E. coli overexpressing an alcoholdehydrogenase, ADH). Both steps were performed in
Heck-type coupling vs. conjugate addition in phosphine–rhodium catalyzed reactions of aryl boronic acids with α,β-unsaturated carbonyl compounds: a systematic investigation
Heck-type coupling and conjugateaddition by synergistically tuning the supporting ligand, the boronic acid to olefin ratio and other reaction conditions. Conjugateaddition with selectivity >99% and Heck-type coupling with selectivity of up to 100%, 98% and 84% for acrylates, acrylamides and methyl vinyl ketone, respectively, could be achieved in the rhodium-catalyzed reactions of aryl boronic acids
The invention relates to the compound of general formula (I) as novel inhibitors of transglutaminases, to methods for producing the inventive compounds, to pharmaceutical compositions containing said inventive compounds and to their use for the prophylaxis and treatment of diseases associated with transglutaminases.
Peptide-Catalyzed Regio- and Enantioselective Reduction of α,β,γ,δ-Unsaturated Aldehydes
作者:Kengo Akagawa、Jun Sen、Kazuaki Kudo
DOI:10.1002/anie.201305004
日期:2013.10.25
in the title reaction. The inherent regioselectivity was overcome by the peptide catalyst to promote the 1,6‐selective reaction prior to 1,4‐reduction. High stereoconvergence was also achieved when using a mixture of geometric isomers of the starting aldehydes. Ach=1‐amino‐1‐cyclohexanecarboxylic acid.