Research Article
Synthesis of Benzothiophene-Fused Pyran Derivatives via Piperidine Promoted Domino Reaction
Table 1
Optimization of .
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conditions: 0.2 mol thioaurone 1a, 0.4 mol malononitrile 2a, 2.0 mL solvent at the corresponding temperature, and 10% mol piperidine as catalyst. yields. catalyst. acid as an additive. |