141357-20-2Relevant academic research and scientific papers
A new route to 3H-1,5-benzodiazepines and heterocyclic ketene animals from benzoyl substituted ketene dithioacetals and diamines
Huang,Wang
, p. 1273 - 1276 (2007/10/02)
Heterocyclic ketene aminals 5 or 3H-1,5-benzodiazepines 4 were obtained from the reaction of benzoyl substituted ketene dithioacetals 1 with various diamines 2. The mechanism of formation of these two different products are discussed.
THE SYNTHESIS AND TAUTOMERIZATION OF KETENE AMINALS WITH BENZIMIDAZOLINE RING
Huang, Zhi-Tang,Wang, Mei-Xiang
, p. 2325 - 2332 (2007/10/02)
The first isolation of benzimidazoline ring substituted ketene aminals 7a-c and/or their amidine tautomers 7'b-d, 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 N,S-acetals 8 and 8' and ketene N,O-acetals 9 and 9', were discussed.
