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RESEARCH LETTERS

Efficient and green synthesis of 4H-pyrans and 4H-pyrano[2,3-c] pyrazoles catalyzed by task-specific ionic liquid [bmim]OH under solvent-free conditions

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Pages 633-638 | Received 02 Jun 2011, Accepted 19 Apr 2012, Published online: 16 Jul 2012

Figures & data

Table 1. Optimization of reaction conditions for the condensation of 4-chloro benzaldehyde, malononitrile, and ethyl acetoacetate.

Table 2. [bmim]OH catalyzed three-component synthesis of 5-acyl/alkoxycarbonyl-2-amino-4-aryl-3-cyano-6-methyl-4H-pyrans.

Table 3. Synthesis of 4H-pyrano[2,3-c]pyrazoles catalyzed by [bmim]OH via Methods A & B.