Urea cyclisation reaction studies
✍ Scribed by Valérie Niddam; Martial Medou; Jean Dessolin; Carole Trabaud; Michel Camplo; Jean-Louis Kraus
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1997
- Tongue
- English
- Weight
- 350 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0022-152X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Synthetic approaches of N‐α‐hydroxyalkyl amides or urea derivatives are described. In particularly, a new 1,4,6‐oxadiazocine‐2,5,8‐trione was obtained by condensation of glyoxylic acid on urea derivatives in acidic catalysis condition.
📜 SIMILAR VOLUMES
## Abstract The __Arrhenius__ parameters for the unimolecular lactonisation of the K‐salts of the ω‐brom‐undecanoic and ω‐brom‐pentadecanoic acids have been determined. It has been shown that the reaction rate depends on the ionisation of the bromine, not on the cyclisation process. The observation
## Abstract Kinetic studies of the catalyzed urethane reactions between isophorone diisocyanate (IPDI) and alcohols and of the urea reactions between an isocyanate‐terminated prepolymer [IPDI–PPG2000–IPDI, where PPG2000 is poly(propylene glycol) with a number‐average molecular weight of 2000 g/mol]
## Abstract A catalyst derived from __in situ__ complexation of N‐heterocyclic carbenes to palladium bistrifluoroacetate promotes efficient intramolecular Wacker‐type cyclisation reactions under aerobic conditions. A variety of 2‐allylphenols undergo oxidative conversion to dihydrobenzofurans.