## Abstract 4,6โDiaminoresorcinol, which is a raw material of ZYLON (PBO fiber), has an instability in air atmosphere. Therefore, very stable benzo[1,2โd:5,4โd']bisโ2(3H)โoxazolone recognized a useful equivalent of 4,6โdiaminoresorcinol during the stages of production, storage, and transportation.
Facile synthesis of 2,4-dioxo-1,2,3,4-tetrahydroquinazolines by sulfur-assisted carbonylation with carbon monoxide
โ Scribed by Toshiyuki Miyata; Takumi Mizuno; Yoshio Nagahama; Ikuzo Nishiguchi; Tsuneaki Hirashima; Noboru Sonoda
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 263 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1042-7163
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โฆ Synopsis
2,4-Dioxo-l,2,3,4-tetrahydroquinazoIines were easily synthesized in excellent yields by sulfur-assisted carbonylation of'2'-aminobenzamides with carbon monoxide in the presence o f a base, such as DBU or DBN.
๐ SIMILAR VOLUMES
## Abstract The glycerol carbonate synthesis from glycerol, which is an inevitable byโproduct of biodiesel production, was established. By combined sulfurโassisted carbonylation of glycerol under 1.0 MPa of carbon monoxide at 80ยฐC in DMF with oxidation by copper bromide(II), a facile synthetic meth