Tetrahedron

The synthesis and tautomerization of ketene aminals with benzimidazoline ring

ZT Huang, MX Wang

Index: Huang, Zhi-Tang; Wang, Mei-Xiang Tetrahedron, 1992 , vol. 48, # 12 p. 2325 - 2332

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Citation Number: 20

Abstract

The first isolation of benzimidazoline ring substituted ketene aminals 7a–c and/or their amidine tautomers 7′ bd, which were synthesized by the reactions:(1) benzoyl substituted ketene mercaptals 3 with N-methyl-o-phenylenediamine 4, and (2) 1, 2- dimethylbenzimidazole 5 with ethyl benzoates 6, were disclosed. The tautomeric equilibrium between 7 and 7′, along with benzothiazoline and benzoxazoline ring substituted ketene ...