A facile synthesis of 2-substituted pyrano [2, 3-a] carbazoles

K Chellappan, KJR Prasad

Index: Chellappan, Kavitha; Prasad, Karnam Jayarampillai R. Journal of Chemical Research, Miniprint, 2003 , # 10 p. 1025 - 1036

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Abstract

The syntheses of 2-(3 ', 3 '-dimethylacryloyl)-1-hydroxycarbazoles (2), 2, 2-dimethyl-2, 3- dihydropyrano [2, 3-a] carbazol-4 (11H)-ones (3), 6-(3 ', 3 '-dimethylacryloyl)-2, 2-dimethyl-2, 3-dihydropyrano [2, 3-a] carbazol-4 (11H)-ones (4), and 2-phenyl-and 2-methyl-pyrano [2, 3- a] carbazol-4 (11H)-ones (6 and 8), from 1-hydroxycarbazoles in the presence of _3, 3- dimethylacryloyl chloride, cinnamic acid and ethyl acetoacetate, are described.