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Title: Chemical transformations on 6-aryl-3-cyano-4-methylthio-pyran-2(H)-ones: Synthetic and structural studies on novel N-phenylpyrazoles and N-phenylpyrazolylcoumarins
Authors: Kumar, Ajay
Malhotra, Sanjay
Vats, Archana
Singh, Sanjay K
Sharma, Sunil K
Prasad, Ashok K
Errington, William
Olsen, Carl E
Jain, Subhash C
Parmar, Virinder S
Issue Date: Feb-2002
Publisher: NISCAIR-CSIR, India
Abstract: Seven 6-aryl-3-cyano-4-methylthiopyran-2(H)-ones 1-7 have been prepared and used for the efficient synthesis of twelve 1,3-diaryl-5-cyanomethylpyrazoles 8-19, one 3-cyanomethyl-5-(3,4-methylenedioxyphenyl)pyrazole 22 and one 5-cyanomethyl-3-phenylisoxazole 23. Further, two 1,3-diaryl -5-cyanomethylpyrazoles 10 and 11 have been used for the preparation of three novel N-phenylpyrazolylcoumarins 24-26. Structures of 3-cyano-6-(3,4-methylenedioxyphenyl)-4-methylthiopyran-2(H)-one 7, 3-cyanomethyl-5-(3,4-methylenedioxyphenyl)pyrazole 22 and 5-cyanomethyl-3-phenylisoxazole 23 have been confirmed by their X-ray crystallographic studies.
Page(s): 360-367
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.41B(02) [February 2002]

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