Tetrahedron Letters p. 8229 - 8232 (1998)
Update date:2022-08-03
Topics:
Chen, Chen
Wilcoxen, Keith
McCarthy, James R.
Condensation of α-phthaloylaminoacetophenones 1a-c with N,N- dimethylformamide dimethyl acetal afforded the novel enamines 3a-c. Cyclization of 3 with hydrazine, alkylhydrazine or phenylhydrazine salts (4a- d) gave 4-phthaloylamino-3-arylpyrazoles 7-9 in
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