Synthesis of 2-[ 4-(3,5-Dimethyl-1 (H)-Pyrazole)phenyl]- 4H-1-Benzo(B)pyran-4-One and its Derivatives

Nadkarn-Sacasa Research Laboratory, Department of Chemistry, St. Xavier's College, Bombay-400 001 Manuscript received 15 May 1982, accepted 10 December 1982 Synthesis of heteroanalogues substituted at the position 2 of 4H-1-benzooyran-4- one viz., 244-(3,5-ditnethy1-1(H)-pyrazole)phenyll, 7-hydroxy-2-[4-(3, 5.dimethy1-1(H)- pyrazole)phenyll and 5,7-dihydroxy-2-[4-(3,5-dimethyl-1(H)-pyrazole)phenyl]-4H-1- benzo(b)pyran-4-ones have been described