Programmed synthesis of arylthiazoles through sequential C–H couplings
作者:Satoshi Tani、Takahiro N. Uehara、Junichiro Yamaguchi、Kenichiro Itami
DOI:10.1039/c3sc52199k
日期:——
A programmed synthesis of privileged arylthiazoles via sequential C–Hcouplings catalyzed by palladium or nickel catalysts has been accomplished. This versatile protocol can supply all possible arylthiazole substitution patterns (2-aryl, 4-aryl, 5-aryl, 2,4-diaryl, 2,5-diaryl, 4,5-diaryl, and 2,4,5-triaryl) from an unfunctionalized thiazole platform by 11 distinct synthetic routes. We have generated
2-Amino-4-arylthiazoles through One-Pot Transformation of Alkylarenes with NBS and Thioureas
作者:Kaho Shibasaki、Hideo Togo
DOI:10.1002/ejoc.201900100
日期:2019.4.16
Various alkylarenes were successfully transformed into the corresponding 2‐amino‐4‐arylthiazoles and 2,4‐diarylthiazoles in good to moderate yields by the treatment with NBS, followed by the reaction with thioureas or arenethioamides.
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.
Several straightforward and practical processes have been established for the construction of 2-aminothiazoles, 1,3-thiazoles and 1,3-selenazoles from aryliodoazides. These strategies successfully proceed with a wide spectrum of substituted thioamides and its derivatives producing the resulting five-membered heterocycles obtained in satisfactory yields. The unique features of these protocols are operational