An efficient synthesis of 2-aminobenzochromene derivatives catalysed by tetrabutylammoniumbromide (TBABr) under microwave irradiation in aqueous medium

1328-1331TBABr efficiently catalyzes the three-component coupling of substituted aldehyde, ⍺-naphthol or β-naphthol and malononitrile to afford the corresponding 2-aminobenzochromene, the new protocol under microwave irradiation works in the absence of organic solvent, the yields are high and the reactions go to completion within 2-3 min

Synthesis of ⍺,⍺'-bis (arylmethylidene) cycloalkanones catalyzed by molecular iodine: An improved procedure for the Claisen-Schmidt condensation

1025-1027Molecular iodine efficiently catalyzes the two-component condensation of cycloalkanones and araldehydes to afford the corresponding ⍺,⍺'-bis (arylmethylidene) cycloalkanones. The new protocol for the Claisen-Schmidt condensation reaction works well in the absence of the solvent. The yields are high and reactions go to completion 10-15 min under mild condition