๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

New Efficient Synthesis of 1,2,4-Triazolo[5,1-b]quinazolin-9(3H)-ones via a Tandem Aza-Wittig/Heterocumulene-Mediated Annulation

โœ 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

No coin nor oath required. For personal study only.


๐Ÿ“œ SIMILAR VOLUMES


Efficient synthesis of benzothieno[3,2-d
โœ Sheng-Zhen Xu; Min-Hui Cao; Chang-Shui Chen; Ming-Wu Ding ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› Journal of Heterocyclic Chemistry ๐ŸŒ English โš– 89 KB

## Abstract magnified image The carbodiimides **2**, obtained from reactions of iminophosphorane **1** with isocyanates, reacted with hydrazine to give selectively 3โ€aminoโ€2โ€arylaminobenzothieno[3,2โ€__d__]pyrimidinโ€4(3__H__)โ€ones **4**. Reactions of **4** with triphenylphosphine, hexachloroethane,

Efficient synthesis of benzothieno[3,2-d
โœ Sheng-Zhen Xu; Jing Wu; Min-Hui Cao; Ming-Wu Ding ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› Journal of Heterocyclic Chemistry ๐ŸŒ English โš– 102 KB

## Abstract magnified image Carbodiimide **2**, obtained from azaโ€Wittig reaction of iminophosphorane **1** with aromaic isocyanate, reacted with ฮฑโ€amino ester in the presence of catalytic amount of sodium ethoxide to give selectively new tetracyclic benzothieno[3,2โ€d]โ€imidazo[1,2โ€a]pyrimidineโ€2,5