Regiocontrolled Palladium-Catalyzed Arylative Cyclizations of Alkynols
作者:Daishi Fujino、Hideki Yorimitsu、Atsuhiro Osuka
DOI:10.1021/ja5029028
日期:2014.4.30
Tuning the reactivity of arylpalladium intermediates enables control of catalyticarylative 5-exo and 6-endo cyclizations of alkynols. The two modes of cyclizations represent a rare example of controllable, regioselective difunctionalization of alkynes. The cyclizations are useful in offering a divergent synthesis of oxygen-containing heterocycles, which is of synthetic use for further derivatization
Halocyclization of Alkynoic Thioester and Oxidative Aromatization in One-Pot
作者:Miari Kurihara、Hiroki Shigehisa
DOI:10.1021/acs.joc.4c01018
日期:2024.7.5
This paper reports the halocyclization of alkynoic thioesters, as S-nucleophiles, with N-halosuccinimide, followed by oxidativearomatization with the same reagent for the one-pot synthesis of thiophenes, important heterocycles exhibiting remarkable applications in different disciplines. Brief mechanistic studies were also performed to elucidate the halocyclization process. The potential diverse applications