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Molecules 2000, 5(6), 880-885; doi:10.3390/50600880

A New Synthetic Route to Dihydrobenzopyran Via Tandem Demethylation Cyclisation

Centre for Natural Products, SPIC Science Foundation, Guindy, Chennai 600 032, India
Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai-600 025, India
X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
Author to whom correspondence should be addressed.
Received: 17 April 2000 / Accepted: 26 May 2000 / Published: 16 June 2000
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A tandem demethylation-cyclisation reaction resulting in the formation of pyran rings using AlCl3/EtSH reagent under mild reaction conditions is reported. X-ray diffraction studies on the intermediate support the suggested mechanism. View Full-Text
Keywords: Osthol; pyranocoumarins; demethylation; cyclisation; hard-soft interactions Osthol; pyranocoumarins; demethylation; cyclisation; hard-soft interactions

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Gopalakrishnan, G.; Kasinath, V.; Pradeep Singh, N.D.; Thirumurugan, R.; Sundara Raj, S.S.; Shanmugam, G. A New Synthetic Route to Dihydrobenzopyran Via Tandem Demethylation Cyclisation. Molecules 2000, 5, 880-885.

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