Title
Mechanistic insight on (E)-methyl 3-(2-aminophenyl)acrylate cyclization reaction by multicatalysis of solvent and substrate.
Abstract
The reaction mechanism of (E)-methyl 3-(2-aminophenyl)acrylate (A) with phenylisothiocyanate (B) as well as the vital roles of substrate A and solvent water were investigated under unassisted, water-assisted, substrate A-assisted, and water-A-assisted conditions. The reaction proceeds with four processes via nucleophilic addition, deprotonation and protonation, intramolecular cyclization with hydrogen transfer, and ketoenol tautomerization. According to the different H-shift mode, two possible types of H-shift P1 and P2 are carefully investigated to identify the most preferred pathway, differing in the -NH2 group deprotonation and -CH group of A protonation processes. It is found that substrate A and water not only act as reactant and solvent, but also as catalyst, proton shuttle, and stabilizer in effectively lowering the energy barrier. Therefore, the results demonstrate that the strong donating and accepting ability of -NH2 group on A and the presence of bulk water are the keys to the title reaction proceed. (C) 2016 Wiley Periodicals, Inc.
Year
DOI
Venue
2016
10.1002/jcc.24463
JOURNAL OF COMPUTATIONAL CHEMISTRY
Keywords
Field
DocType
water,DFT,multi-catalysis,(E)-methyl 3-(2-aminophenyl)acrylate,mechanism
Substrate (chemistry),Catalysis,Protonation,Computational chemistry,Chemistry,Polymer chemistry,Nucleophilic addition,Solvent,Photochemistry,Reaction mechanism,Tautomer,Deprotonation
Journal
Volume
Issue
ISSN
37
26
0192-8651
Citations 
PageRank 
References 
0
0.34
2
Authors
5
Name
Order
Citations
PageRank
Jiahui Liu100.34
Yiying Zheng200.68
Ying Liu300.68
Haiyan Yuan401.69
Jingping Zhang597.30