第一作者：Xiong, Wu-Lin

通讯作者：Sun, Hong-bin Sun, Qi

合写作者：Peng, Xiao-Chong Zhong, Ren-Yuan Zheng, Jianwei Duo, Shuwang Gong, Shan-Shan

发表刊物：Asian Journal of Organic Chemistry

期号：12

卷号：10

影响因子：2.8

DOI码：10.1002/ajoc.202100508

所属单位：Department of Chemistry, Northeastern University

教研室：物理化学

刊物所在地：UNITED STATES

摘要：Inspired by the mechanism of the clock reaction, we rationally constructed a novel phosphomolybdenum blue (PMB) clock catalytic system for a highly efficient synthesis of benzimidazoles and benzothiazoles simply at ambient temperature. The current PMB clock catalytic system exhibits a sharp decoloration event to announce the depletion of the intermediateconstraint, making this synthetic approach self-indicating and TLC-free.P-31 NMR and XPS analysis of PMBcatalyst showed that only two Mo6+ atoms are reduced to Mo5+ atoms in the Keggin structure due to the moderate reducibility of benzimidazoline and benzothiazoline intermediates. Thus,the active Keggin-type POM cluster could be well maintained in DMSO during the redox cycling of phosphomolybdic acid (PMA) and PMB. H-1 NMR tracing experiment not only confirmed the proposed reaction mechanism but also showed that PMB exerts Lewis acid catalytic activityat the early phase of the reaction other than the expected redox catalytic activity.

论文编号：WOS:000711547600001

学科门类：理学

一级学科：化学

页面范围：3321-3327

ISSN号：2193-5807

是否译文：否