Brønsted acid-promoted thiazole synthesis under metal-free conditions using sulfur powder as the sulfur source
作者:Penghui Ni、Jing Tan、Rong Li、Huawen Huang、Feng Zhang、Guo-Jun Deng
DOI:10.1039/c9ra09656f
日期:——
acid-promoted sulfuration/annulation reaction for the one-pot synthesis of bis-substituted thiazoles from benzylamines, acetophenones, and sulfur powder has been developed. One C–N bond and multi C–S bonds were selectively formed in one pot. The choice of the Brønsted acid was the key to the high efficiency of this transformation under metal-free conditions.
One-Pot Preparation of Aromatic Amides, 4-Arylthiazoles, and 4-Arylimidazoles from Arenes
作者:Takahiro Yamamoto、Hideo Togo
DOI:10.1002/ejoc.201800730
日期:2018.8.15
Primary aromatic amides, 4‐arylthiazoles, and 4‐arylimidazoles were smoothly obtained from arenes in good yield in onepot via aryl α‐bromoacetylarenes, which were obtained by reacting simple arenes with α‐bromoacetyl chloride and AlCl3, followed by the reaction with molecular iodine and aq. NH3, thioamides, or amidine under transition‐metal‐free conditions.