Harjit Singh, ; Singh, Paramjit (1980) Synthesis of heterocyclic compounds via enamines. Part 8. Acid-catalysed transformations in 4,4,6-trimethyl-1,4-dihydropyrimidine-2(3H)-thione derivatives and related compounds Journal of the Chemical Society, Perkin Transactions 1 . pp. 1013-1018. ISSN 0300-922X
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Official URL: http://www.rsc.org/publishing/journals/P1/article....
Related URL: http://dx.doi.org/10.1039/P19800001013
Abstract
1-Substituted 4,4,6-trimethyl-1,4-dihydropyrimidine-2(3H)-thiones (2) on heating in 11M-HCl at 100-110° are converted into the corresponding 2-substituted-amino-4,6,6-trimethyl-6H-1,3-thiazines (4) and/or thioureas. But at 95-100°, Dimroth rearrangement products, e.g, the corresponding 2-substituted-amino-4,4,6-trimethyl 4H-1,3-thiazines (3) are formed.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Royal Society of Chemistry. |
| ID Code: | 14619 |
| Deposited On: | 12 Nov 2010 13:57 |
| Last Modified: | 03 Jun 2011 04:40 |
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