Highly Efficient and Practical Synthesis of the Key Intermediate of Telmisartan
作者:Jianhong Zhao、Yicheng Xiong、Wu-Lin Yang、Fan Yang、Yu Jin
DOI:10.1021/acs.oprd.1c00025
日期:2021.4.16
We reported herein an efficient and practical method to access 1,7′-dimethyl-2′-propyl-2,5′-bi(1H-benzimidazole) 1, a key intermediate for the synthesis of telmisartan. The synthetic route was based on readily available o-methylaniline as the starting material, and the target product 1 was prepared through a six-step process, including amidation, formylation, cyclization, hydrolysis, amidine, and oxidation