Ring-closure reaction of N-arylthiomethylaroylamides to 1,3-benzothiazines
N-Arylthiomethylaroylamides substituted with an electron- donating group in the meta position undergo two-directional cyclization in the presence of phosphorus oxychloride to give both positional isomers of the 4H-1,3-benzothiazine derivative. The structures of the products were confirmed by H-1...
Elmentve itt :
| Szerzők: | |
|---|---|
| Dokumentumtípus: | Cikk |
| Megjelent: |
1992
|
| Sorozat: | JOURNAL OF HETEROCYCLIC CHEMISTRY
29 No. 5 |
| Tárgyszavak: | |
| doi: | 10.1002/jhet.5570290545 |
| mtmt: | 1493806 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/32286 |
| Tartalmi kivonat: | N-Arylthiomethylaroylamides substituted with an electron- donating group in the meta position undergo two-directional cyclization in the presence of phosphorus oxychloride to give both positional isomers of the 4H-1,3-benzothiazine derivative. The structures of the products were confirmed by H-1 and C-13 nmr spectroscopy. Mixed ring-closure reactions of several N- arylthiomethylaroylamides 3, 6, 9, 13 have shown that these conversions are introduced by a proton-catalyzed intermolecular rearrangement. |
|---|---|
| Terjedelem/Fizikai jellemzők: | 1321-1324 |
| ISSN: | 0022-152X |