A convenient oxidative cyclodesulfurization method toward the synthesis of benzofused nitrogen heterocycles using inexpensive and readily available potassium periodate as an oxidant was developed. Upon treating isothiocyanates with ortho-substituted anilines bearing N,N-, N,O-, and N,S-bis-nucleophiles, followed by an intramolecular cyclization of the in situ generated monothioureas, substituted 2-aminobenzazole
A one-pot method for the synthesis of 2-aminobenzimidazoles and related heterocycles
作者:Victor J. Cee、Nicholas S. Downing
DOI:10.1016/j.tetlet.2006.03.112
日期:2006.5
A rapid and efficient one-pot method for the synthesis of 2-aminobenzimidazoles and related heterocycles is described. The reaction is mediated by a polymer-supported carbodiimide, which simplifies product isolation. The scope and limitations of this method are described.
Copper-Catalyzed CNH<sub>2</sub>Arylation of 2-Aminobenzimidazoles and Related C-Amino-NH-azoles
作者:Desaboini Nageswar Rao、Sk. Rasheed、Karampoori Anil Kumar、Annem Siva Reddy、Parthasarathi Das
DOI:10.1002/adsc.201600035
日期:2016.6.30
nucleophilic sites that are selectively arylated at the CNH2 position are obtained, providing an exceptional tool for rapid delivery of a diverse array of medicinally important CNH(aryl) derivatives of aminoazoles without any protection/deprotection of ring NH bonds. It is first example for the selective CNH2 arylation of 5‐aminoindazole, 4‐aminopyrazole, 5‐aminopyrazole, 9H‐purine‐6‐amine, and 1H‐pyrazolo[3
Disclosed is a compound of formula (I), wherein R1, R2, L, Rm and Rn are as defined herein. The compound of formula (I) may be used in preventing and/or treating acyl CoA-diacylglycerol acyltransferase 1(DGAT-1) related diseases, such as obesity, coronary disease, hypertension, hyperlipidemia, arteriosclerosis, type II diabetes, stroke, hepatitis C, and the like.
Novel Synthesis of 2-Aminobenzimidazoles from Isoselenocyanates
作者:Yuanyuan Xie、Fan Zhang、Jianjun Li、Xiangjun Shi
DOI:10.1055/s-0029-1219395
日期:2010.4
An efficient one-pot procedure for the synthesis of 2-aminobenzimidazoles from isoselenocyanates and various substituted diamines is described. Precipitation of elemental selenium from the reaction mixture greatly simplifies the purification procedure and also allows it to be re-used for preparation of isoselenocyanates. A possible mechanism for the formation of 2-aminobenzimidazoles is proposed.