<i>i</i>-Pr<sub>2</sub>NMgCl·LiCl Enables the Synthesis of Ketones by Direct Addition of Grignard Reagents to Carboxylate Anions
作者:Kilian Colas、A. Catarina V. D. dos Santos、Abraham Mendoza
DOI:10.1021/acs.orglett.9b02899
日期:2019.10.4
preparation of ketones from carboxylate anions is greatly limited by the required use of organolithiumreagents or activated acyl sources that need to be independently prepared. Herein, a specific magnesium amide additive is used to activate and control the addition of more tolerant Grignardreagents to carboxylate anions. This strategy enables the modular synthesis of ketones from CO2 and the preparation
Structural alterations to the benzylic position of the first drug-like selective angiotensin II AT(2) receptor agonist (1) have been performed, with the emphasis to reduce the CYP 450 inhibitory property of the initial structure. The imidazole moiety, responsible for the CYP 450 inhibitory effect in 1, was replaced with various heterocycles. In addition, the modes of attachment of the heterocycles, that is, carbon versus nitrogen attachment, and introduction of carbonyl functionalities to the benzylic position have been evaluated. In all the three series, AT(2) receptor ligands with affinity in the lower nanomolar range were identified. None of the analogues, regardless of the substituents, exhibited any affinity for the AT(1) receptor. Compounds with substantially reduced inhibition of the CYP 450 enzymes were obtained. Among them the compound 60 was found to induce neurite elongation in NG 108-15 cells and served as potent AT(2) selective agonist. (C) 2010 Elsevier Ltd. All rights reserved.
Spirodioxolane intermediates in the reaction of 2-(trimethylsilyl)thiazole with aldehydes. Support for the 2-ylide mechanism
作者:Alessandro Dondoni、Alan W. Douglas、Ichiro Shinkai
DOI:10.1021/jo00063a053
日期:1993.5
Dondoni Alessandro, Douglas Alan W., Shinkai Ichiro, J. Org. Chem., 58 (1993) N 11, S 3196-3200
作者:Dondoni Alessandro, Douglas Alan W., Shinkai Ichiro
DOI:——
日期:——
(DIAZOLO-PYRIDINYL)-PYRIMIDINES FOR USE IN TREATMENT OF CNS DISORDERS AND DIABETES