Fm. Abd El Latif, An improved synthesis of pyrazolo[3,4-b][1,5]benzoxazepine, -benzothiazepine and -benzodiazepine derivatives via a convenient one-pot synthesis, J HETERO CH, 37(6), 2000, pp. 1659-1662
An improved and simple method for the preparation of pyrazolo[3,4-b][1,5]be
nzoxazepine, -benzothiazepine and -benzodiazepine derivatives was establish
ed by the reaction of 5-chloro-1-phenylpyrazole-4-carbaldehydes, ethyl 3-(5
-chloro-1,3-diphenylpyrazol-4-yl)-2-cyanoacrylate and 1,4-dincetyl-3-methyl
-2-pyrazolin-5-one with o-aminophenol derivatives and o-phenylendiamine.