2-HALO-INDAN-1,3-DIONES AND THEIR USE IN PREPARING 2-NITRO-INDAN-1,3 DIONES

摘要

1500485 Indan-1,3-diones BEECHAM GROUP Ltd 3 Feb 1975 [21 Feb 1974] 7842/74 Heading C2C Compounds I in which R 1 and R 2 are each C 1-6 alkyl or together represent tetramethylene or trimethylene are prepared by reacting novel Compounds II in which X is Cl, Br or I with a nitrite preferably NaNO 2 . Compounds II are prepared by halogenation of S-R 1 -6-R 2 -indan-1,3-dione.