Patent ID: 7923442
Filing Date: 2011-04-12
Classification: C07D

Abstract:
1. A compound of formula 1: wherein, the compound of formula 1 is a ring; and X is O or NH M is Se or Te n is 0 or 1 R oxygen and forms an oxo complex with M; oxygen and forms together with the metal, a 4-7 membered ring, which optionally is substituted by an oxo or amino group; or oxygen and forms together with the metal, a first 4-7 membered ring, which is optionally substituted by an oxo or amino group, wherein said first ring is fused with a second 4-7 membered ring, wherein said second 4-7 membered ring is optionally substituted by alkyl, alkoxy, nitro, aryl, cyano, hydroxy, amino, halogen, oxo, carboxy, thio, thioallcyl, or —NH(C═O)R R or R