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Microwave Assisted Solid-Support Synthesis of Heterocyclic Systems Containing Bridgehead Nitrogen Atoms

Author(s): V. Peesapati and Appa Rao Thoomu

2-Arylidene-7-methyl-3,4-dihydro-H-naphthalen-1-one (2a-l) was obtained by the condensation of 7-methyl-3,4-dihydro-2H-naphthalen-1-ones (1A), with aromatic aldehydes in ethanolic KOH. Compounds (2a-l) on reaction with thiourea in alkaline medium under conventional method yielded thiones (3a-l). In microwave method (2a-l) was obtained by the condensation of (1a), with aromatic aldehydes, 2-3 drops of alc. KOH and basic alumina. Compounds (2a-l) on reaction with thiourea and basic alumina for yielded thiones (3a-l). A considerable increase in the reaction rate has been observed with better yields.

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