## Abstract For Abstract see ChemInform Abstract in Full Text.
New Efficient Synthesis of 1,2,4-Triazolo[5,1-b]quinazolin-9(3H)-ones via a Tandem Aza-Wittig/Heterocumulene-Mediated Annulation
โ Scribed by Ming-Wu Ding; Yun-Feng Chen; Nian-Yu Huang
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 144 KB
- Volume
- 2004
- Category
- Article
- ISSN
- 1434-193X
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๐ SIMILAR VOLUMES
## Abstract magnified image The carbodiimides **2**, obtained from reactions of iminophosphorane **1** with isocyanates, reacted with hydrazine to give selectively 3โaminoโ2โarylaminobenzothieno[3,2โ__d__]pyrimidinโ4(3__H__)โones **4**. Reactions of **4** with triphenylphosphine, hexachloroethane,
## Abstract magnified image Carbodiimide **2**, obtained from azaโWittig reaction of iminophosphorane **1** with aromaic isocyanate, reacted with ฮฑโamino ester in the presence of catalytic amount of sodium ethoxide to give selectively new tetracyclic benzothieno[3,2โd]โimidazo[1,2โa]pyrimidineโ2,5