Cobalt-Catalyzed Cross-Coupling of α-Bromo Amides with Grignard Reagents
作者:E. Barde、A. Guérinot、J. Cossy
DOI:10.1021/acs.orglett.7b02848
日期:2017.11.17
A cobalt-catalyzedcross-coupling between α-bromo amides and Grignardreagents is disclosed. The reaction is general and allows access to a large variety of α-aryl and β,γ-unsaturated amides. Some mechanistic investigations have been undertaken to determine the nature of the intermediate species.
Isothiourea-catalysed enantioselective Michael addition of N-heterocyclic pronucleophiles to α,β-unsaturated aryl esters
作者:Chang Shu、Honglei Liu、Alexandra M. Z. Slawin、Cameron Carpenter-Warren、Andrew D. Smith
DOI:10.1039/c9sc04303a
日期:——
The isothiourea-catalysed enantioselective Michaeladdition of 3-aryloxindole and 4-substituted-dihydropyrazol-3-one pronucleophiles to α,β-unsaturated p-nitrophenyl esters is reported. This process generates products containing two contiguous stereocentres, one quaternary, in good yields and excellent enantioselectivities (>30 examples, up to > 95 : 5 dr and 99 : 1 er). This protocol harnesses the
Carbazole-containing amides and ureas: Discovery of cryptochrome modulators as antihyperglycemic agents
作者:Paul S. Humphries、Ross Bersot、John Kincaid、Eric Mabery、Kerryn McCluskie、Timothy Park、Travis Renner、Erin Riegler、Tod Steinfeld、Eric D. Turtle、Zhi-Liang Wei、Erik Willis
DOI:10.1016/j.bmcl.2017.12.051
日期:2018.2
A series of novel carbazole-containing amides and ureas were synthesized. A structure–activity relationship study of these compounds led to the identification of potent cryptochrome modulators. Based on the desired pharmacokinetic/pharmacodynamic parameters and the results of efficacy studies in db/db mice, compound 50 was selected for further profiling.
Kinetic resolution of racemic pyrrolidine-2,5-diones using chiral oxazaborolidine catalysts
作者:Mike D. Barker、Rachel A. Dixon、Simon Jones、Barrie J. Marsh
DOI:10.1039/b800510a
日期:——
Kinetic resolution of racemic C-3 substituted pyrrolidine-2,5-diones has been achieved for the first time using highly efficient oxazaborolidine catalysts derived from cis-1-amino-indan-2-ol.