943785-07-7Relevant academic research and scientific papers
Efficient synthesis of benzothieno[3,2-d]-imidazo[1,2-a] pyrimidine-2,5-(1H, 3H)-diones via a tandem aza-Wittig/heterocumulene-mediated annulation
Xu, Sheng-Zhen,Wu, Jing,Cao, Min-Hui,Ding, Ming-Wu
experimental part, p. 68 - 71 (2010/05/03)
(Chemical Equation Presented) Carbodiimide 2, obtained from aza-Wittig reaction of iminophosphorane 1 with aromaic isocyanate, reacted with α-amino ester in the presence of catalytic amount of sodium ethoxide to give selectively new tetracyclic benzothieno[3,2-d]-imidazo[1,2-a]pyrimidine-2, 5-(1H, 3H)-diones 5 in good yields. X-Ray structure analysis of 5b verified the proposed structure and the reaction selectivity.
Efficient synthesis of benzothieno[3,2-d]-1,2,4-triazolo [1,5-a]pyrimidin-5(1H)-ones via a tandem aza-Wittig/heterocumulene-mediated annulation
Xu, Sheng-Zhen,Cao, Min-Hui,Chen, Chang-Shui,Ding, Ming-Wu
experimental part, p. 903 - 908 (2010/01/11)
(Chemical Equation Presented) The carbodiimides 2, obtained from reactions of iminophosphorane 1 with isocyanates, reacted with hydrazine to give selectively 3-amino-2-arylaminobenzothieno[3,2-d]pyrimidin-4(3H)-ones 4. Reactions of 4 with triphenylphosphi
New efficient synthesis of 2-substituted benzothieno[3,2-d]pyrimidin-4(3H)- ones via a tandem aza-Wittig reaction
Xu, Sheng-Zhen,Hu, Yang-Gen,Ding, Ming-Wu
, p. 4180 - 4186 (2008/03/13)
1-Aryl-3-[2-(ethoxycarbonyl)benzothien-3-yl]carbodiimides 4, obtained from aza-Wittig reactions of iminophosphorane 3 with aryl isocyanates, reacted with secondary amines, phenols, or alkanols in the presence of a catalytic amount of potassium carbonate o
