X = Y , pour donner un i n t e d d i a i r e d i p o l a i r e qui ne se c y c l i s e pas directement, mais se s t a b i l i s e p a r une r e a c t i o n avec une seconde molicule d ' 6 l e c t r o p h i l e ou avec une seconde mol6c u l e d ' i s o n i t r i l e ( & a c t i o n s 1 e t 2). ## x
Synthièse de nouveaux systèmes hétérocycliques renfermant le benzothiazole, le 1,3,4-thiadiazole et le furane
✍ Scribed by Abdelfettah Zerzouf; Abdoulay Keita; Moussa Salem; El Mokhtar Essassi; Marie-Louise Roumestant; Philippe Viallefont
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 389 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1387-1609
No coin nor oath required. For personal study only.
✦ Synopsis
R6sum6 -Le 2-(4-m&hylphdnyl)acyl-l,3-benzothiazole 3b rdagit avec le N-bromosuccinimide pour donner le produit de dimdrisation 4. Ce dernier, portd au refux du tri&hylphosphite, se transforme en furane 5. Le 2-phdnacyl-1,3-benzothiazole 3a, apr&s sulfuration et reaction avec les nitrilimines 7 et 8 conduit aux 1,3,4-thiadiazoles 9 et 10. O 1999 Acaddmie des sciences/l~ditions scientifiques et mddicales Elsevier SAS 1,3-benzothiazoles / dim~risation / furane / 1,3,4-thiadiazoles Abstract -Synthesis of new heterocyclic systems containing benzothiazole, 1,3,4-thiadiazole and furan. The 2-(4-methylphenyl)acyl-l,3-benzothiazole 3b reacts with the N-bromosuccinimide to give the dimerised compound 4. This product leads to the furane 5 by refluxing in triethylphosphite. The 2-phenylacyl-1,3-benzothiazole 3a leads to 1,3,4-thiadiazoles 9 and 10 by sulfurisation and condensation with nitrilimines 7 and 8.
📜 SIMILAR VOLUMES
Substituted pyridazines, pyrimidines and s-triazines yield very simple N. M. R. spectra. Substituent effects of electron releasing groups are enhanced in these heterocycles, and surprisingly large shifts occur at the meta positions. The JP-5 in 3,6-disubstituted pyridazines vary with the electron re
## 4-Chloro-3-chloromethylheptane (2) and 1,2,4-trichloropentane (3) were synthesized and analysed by means of 'H NMR. These compoundswith two asymmetric carbon atomsare models for two types of structure involving chloromethyl groups present in poly(viny1 chloride): short chloromethyl branches and