𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A new route to 1,4-disubstituted 5-thioxoperhydroimidazo[4,5-d]imidazol-2-ones

✍ Scribed by Jiřı́ Verner; Jan Taraba; Milan Potáček

Publisher
Elsevier Science
Year
2002
Tongue
French
Weight
125 KB
Volume
43
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

1,4-Disubstituted 5-thioxoperhydroimidazo [4,5-d]imidazol-2-ones were prepared by one-pot criss-cross cycloaddition reactions of 1,4-disubstituted 1,4-diazabuta-1,3-dienes with HNCS and HNCO generated in situ from potassium salts by acetic acid.

📜 SIMILAR VOLUMES

A new convenient synthesis of 2,4-disubs
A new convenient synthesis of 2,4-disubstituted-1,2,4-triazolo[1,5-a] quinazolin-5(4H)-ones
✍ Ahmad S. Shawali; Hamdi M. Hassaneen; Nabil Kh. Shurrab 📂 Article 📅 2008 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 215 KB 👁 1 views

## Abstract magnified image A novel series of 2,4‐disubstituted‐1,2,4‐triazolo[1,5‐__a__]quinazolin‐5(4__H__)‐ones were prepared by Dimroth rearrangement of their respective isomers namely 1,4‐disubstituted‐[1,2,4]triazolo[4,3‐__a__]‐quinazolin‐5(4__H__)‐ones. The latter were prepared __via__ new

A new efficient route to imidazo[4,5-c]p
A new efficient route to imidazo[4,5-c]pyrazol-5-ones
✍ Chiara B. Vicentini; Augusto C. Veronese; Maurizio Manfrini 📂 Article 📅 1997 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 276 KB

## Abstract The synthesis of imidazo[4,5‐__c__]pyrazol‐5‐ones (6) is reported. 5‐Amino‐4‐ethoxycarbonylaminopyra‐zoles 3a‐g when heated at 200° for 2 hours afford 6a‐g. In a similar manner imidazo[4,5‐__c__]pyrazol‐5‐one (6a) is readily obtained from 4‐amino‐5‐ethoxycarbonylaminopyrazole (5a).