Dioxazolones as masked ester surrogates in the Pd(<scp>ii</scp>)-catalyzed direct C–H arylation of 6,5-fused heterocycles
作者:Paridhi Saxena、Neha Maida、Manmohan Kapur
DOI:10.1039/c9cc05563k
日期:——
simple and effective Pd(II)-catalyzed regioselectiveC(2)–H arylation of 6,5-fused heterocycles with dioxazolones as a masked ester surrogate undermildconditions is reported. The significance of the arylation is highlighted by the new reactivity demonstrated in dioxazolones via proximal C–H activation of the cyclic carbonate of the hydroxamic acid functionalityunder protic conditions.
Discovery of Novel and Potent Retinoic Acid Receptor α Agonists: Syntheses and Evaluation of Benzofuranyl-pyrrole and Benzothiophenyl-pyrrole Derivatives
In the course of our studies on retinoic acid receptor (RAR) agonists, we have designed and synthesized a series of benzofuran and benzothiophene derivatives. Some of these compounds (1a,b,e,f,j) markedly inhibited LPS-induced B-lymphocyte proliferation and exerted RAR alpha selectivity. One of them, 4-[5-(4,7-dimethylbenzofuran-2-yl)pyrrol-2-yl]benzoic acid (1b), when orally administered significantly inhibited mouse antibody production and delayed type hypersensitivity (DTH) responses from a dose of 0.1 mg/kg.
Stoermer, Chemische Berichte, 1897, vol. 30, p. 1709