An Efficient Conversion of Phenolic Esters to Benzothiazoles under Mild and Virtually Neutral Conditions
作者:Asit K. Chakraborti、Santosh Rudrawar、Gurmeet Kaur、Lalima Sharma
DOI:10.1055/s-2004-829089
日期:——
Phenolic esters are efficiently converted to 2-substituted benzothiazoles in a one-pot reaction by treatment with 2-aminothiophenol in the presence of a catalytic amount of K2CO3 in N-methyl-2-pyrrolidone (NMP) at 100 °C.
在 100 °C 的 N-甲基-2-吡咯烷酮(NMP)中,在一定量的 K2CO3 催化下,通过与 2-氨基苯硫酚的一锅反应,酚酯可高效地转化为 2-取代的苯并噻唑。
Palladium-Catalyzed External-CO-Free Carbonylation of Aryl Bromides Using 2,4,6-Trichlorophenyl Formate
作者:Hideyuki Konishi、Tomoyuki Sekino、Kei Manabe
DOI:10.1248/cpb.c18-00042
日期:2018.5.1
A practical Pd-catalyzed carbonylation of (hetero)arylbromides using a crystalline carbon monoxide (CO) surrogate, 2,4,6-trichlorophenyl formate (TCPF), was developed. This reaction proceeds without the slow addition technique that was previously required and with a low catalyst loading (1 mol%). The utility of this Pd-catalyzed external-CO-free carbonylation using TCPF was demonstrated in the synthesis