A Mild Synthesis of 2-Substituted Benzothiazoles via Nickel-Catalyzed Intramolecular Oxidative C–H Functionalization
作者:Ming-Yuan Gao、Jing-Hang Li、Shi-Bo Zhang、Li-Jun Chen、Yue-Sheng Li、Zhi-Bing Dong
DOI:10.1021/acs.joc.9b02543
日期:2020.1.17
A highly efficient synthetic method for the preparation of 2-aminobenzothiazoles starting from arylthioureas has been reported. By using a nickel catalyst, arylthioureas undergo intramolecular oxidative C-H bond functionalization, giving the desired 2-aminobenzothiazoles in good to excellent yields. This protocol features an inexpensive catalyst, low catalyst loading, mild reaction conditions, a short
已经报道了从芳基硫脲开始制备2-氨基苯并噻唑的高效合成方法。通过使用镍催化剂,芳基硫脲进行分子内氧化CH键官能化,以良好至优异的产率得到所需的2-氨基苯并噻唑。该方案具有廉价的催化剂,催化剂用量低,反应条件温和,反应时间短,收率良好至优异的特点,并且可以轻松按比例放大至克级,而收率几乎没有下降。