abstract |
3 - HETEROARYL - 2-THIO-1,3-THIAZANE-2,4-DIONES IN WHICH THE HETEROARYL MOIETY IS PYRIDYL, THIAZOLYL, THIENYL, FURYL, PYRIDAZINYL, THIADIAZOLYL, PYRIMIDYL OR TRIAZINYL AND HAVING ANTI-ARTHRITIC ACTIVITY ARE GENERALLY PREPARED VIA RING CLOSURE OF A B-(THIOCARBAMOYLTHIO) SUBSTITUTED CARBOXYLIC ACID WITH ACETIC ANHYDRIDE/CONCENTRATED SULFURIC ACID. |