This invention is related to novel di-substituted aminomethyl chroman derivatives which are useful in the treatment of beta-3 receptor-mediated conditions.
Pyridazinones having cardiotonic and beta blocking activities
申请人:Glaxo Inc.
公开号:US05096904A1
公开(公告)日:1992-03-17
Pyridazinones of the following formula (I): ##STR1## where R.sup.1 -R.sup.4 are a variety of substituents and L is a linking group, a pharmaceutical composition for treating congestive heart failure, novel intermediates, methods for such treatment and processes for preparing compounds of formula (I).
Chiral Bifunctional Metalloporphyrin Catalysts for Kinetic Resolution of Epoxides with Carbon Dioxide
作者:Chihiro Maeda、Mayato Mitsuzane、Tadashi Ema
DOI:10.1021/acs.orglett.9b00447
日期:2019.3.15
triazolium halide units were synthesized as bifunctional catalysts for kinetic resolution of epoxides with CO2. Several catalysts were screened by changing the linker length and nucleophilic counteranions, and the optimized catalyst accelerated the enantioselective reaction at ambient temperature to produce optically active cyclic carbonates and epoxides.
Jacobsen-type enantioselective hydrolysis of aryl glycidyl ethers.<sup>31</sup>P NMR analysis of the enantiomeric composition of oxiranes
作者:A. A. Bredikhin、E. I. Strunskaya、V. G. Novikova、N. M. Azancheev、D. R. Sharafutdinova、Z. A. Bredikhina
DOI:10.1023/b:rucb.0000024851.29744.21
日期:2004.1
The enantioselective partial hydrolysis of a number of racemic arylglycidylethers in the presence of chiral Co(salen)-catalyst was studied. The enantiomeric composition of the isolated (R)-aryl glycidylethers was analyzed by 31P NMR using optically active substituted 2-chloro-1,3,2-dioxaphospholanes. A synthesis of β-adrenoblocking agents (S)-toliprolol and (S)-moprolol based on the simultaneously
The phenyl glycidyl ether derivatives have been kinetically resolved with the growing cells of Bacillus alcalophilus MTCC10234 yielding (S)-epoxides with up to >99% ee and (R)-diols with up to 89% ee. The enantiomeric ratio (E) of up to 67 has been obtained for biohydrolysis process. The effect of different substituents of phenyl glycidyl ether on the biocatalytic efficiency of B. alcalophilus MTCC10234