Regioselective Radical Arylation of 3-Hydroxypyridines
作者:Michael C. D. Fürst、Leonard R. Bock、Markus R. Heinrich
DOI:10.1021/acs.joc.6b00894
日期:2016.7.1
The titanium(III)-mediated radical arylation of 3-hydroxypyridines was found to proceed with high regioselectivity for the 2-position. Using aryldiazonium chlorides, which were prepared from the corresponding anilines, as aryl radical sources, a range of 3-hydroxy-2-phenylpyridines were obtained in moderate to good yields under simple reaction conditions. Reactions of ortho-carboxylic ester substituted
This invention relates to a class of pyrrolidine compounds of formula (I), and pharmaceutical ly acceptable derivatives thereof, to their use in med icine, to compositions containing them, and to processes for their preparation. It also relates to intermediates used in the preparation of such compounds and derivatives. In particular the compounds of formula (I) are useful for the treatment of EP2-mediated conditions, such as endometriosis, uterine fibroids (leiomyomata), menorrhagia, adenomyosis, primary and secondary dysmenorrhoea (including symptoms of dyspareunia, dyschexia and chronic pelvic pain), chronic pelvic pain syndrome, polycystic kidney disease and polycystic ovarian syndrome.