54903-56-9Relevant articles and documents
C-formylation of some 2(3H)-benzazolones and 2H-1,4-benzoxazin-3(4H)-one
Petrov, Ognyan I.,Kalcheva, Veneta B.,Antonova, Antonina Ts.
, p. 494 - 497 (1997)
The C-formylation of 1,3-dimethyl-2(3H)-benzimidazolone and 4-methyl-2H-1,4-benzoxazin-3(4H)-one was performed using 1,1-dichloromethyl methyl ether at the Friedel-Crafts reaction conditions. The formylation of 3-methyl-2(3H)-benzoxa-and -thiazolone at the 6-position was carried out by modified Duffs method with hexamethylenetetramine in trifluoroacetic acid.