The preparation of a series of 1-glutarylindoline-2(S)-carboxylic acid derivatives, 6a-v and 21a-c, is described. The above compounds were tested for inhibition of angiotensin converting enzyme. The structure-activity relationship of the series is also discussed. Compound 6u, the most potent member of the series, had an in vitro IC50 of 4.8 X 10(-9) M. Compound 6v, an ethyl ester of 6u, lowered blood pressure 70 mm in spontaneous hypertensive rats at an oral dose of 30 mg/kg.
Catalyticasymmetric protonation of chiral calcium enolates was performed. Chiral calcium enolates, prepared in situ from imides and malonates via 1,4-addition in the presence of catalytic amounts of Ca(OEt)(2), Ph-PyBox, and achiral phenol, were smoothly protonated to afford adducts bearing tertiary asymmetric carbons in high yields with high enantioselectivities. The adducts were readily converted
Optically active bimesogens incorporating branched central spacers
作者:Richard J. Mandle、John W. Goodby
DOI:10.1039/c8ra02075b
日期:——
respectively. Compound 1 exhibited a monotropic chiral nematicphase, however no twist-bend modulated phase was observed. We prepared a number of analogues of 1 incorporating different mesogenic units and observe that those with a small aspect ratio are non mesogenic, whereas those with larger aspect ratios variously exhibit chiral nematic, TB, SmC and SmB phases.
Enantioselective synthesis of a 3-D inorganic net has been achieved leading to metal–organic frameworks built from cobalt-oxide helices in which handedness is controlled by the chirality of the linked ligand.
Antibody catalysts for the removal of the p-nitrobenzylester protecting group have been generated to accommodate a broad range of substrates. Antibody 7B9, which was elicited against p-nitrobenzyl phosphonate 1, catalyzed the hydrolyses of p-nitrobenzyl monoesters of nonsubstituted, and beta- and gamma-substituted glutaric acids with almost identical Km and kcat values. In addition, 7B9 displayed
Enantiopure Chiral Two-dimensional Sinusoidal Lanthanide(III) Coordination Polymers Based on <i>R</i>-/<i>S-</i>2-Methylglutarate: Luminescence, Magnetic Entropy Change, and Magnetic Relaxation
作者:Cai-Ming Liu、Deqing Zhang、Xiang Hao、Daoben Zhu
DOI:10.1021/acs.cgd.9b00602
日期:2019.8.7
lanthanide(III) coordination polymers derived from (R/S)-2-MG at room temperature, which show 2D sinusoidal ruffling (4, 4) network structures with the formulas [Eu2(R-2-MG)3(H2O)4]·0.5H2O}n (Eu-R1), [Gd2(R-2-MG)3(H2O)4]·0.5H2O}n (Gd-R2), [Tb2(R-2-MG)3(H2O)4]·0.5H2O}n (Tb-R3), and [Dy2(R-2-MG)3(H2O)4]·0.5H2O}n (Dy-R4) as well as [Eu2(S-2-MG)3(H2O)4]·0.5H2O}n (Eu-S1), [Gd2(S-2-MG)3(H2O)4]·0.5H2O}n (Gd-S2)