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

A New Synthetic Route to Dihydrobenzopyran Via Tandem Demethylation Cyclisation

Geetha Gopalakrishnan 1,* email, Viswanathan Kasinath 1 , N. D. Pradeep Singh 1 , R. Thirumurugan 2 , S. Shanmuga Sundara Raj 3  and G. Shanmugam 2
1 Centre for Natural Products, SPIC Science Foundation, Guindy, Chennai 600 032, India 2 Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai-600 025, India 3 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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Abstract: 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.
Keywords: Osthol; pyranocoumarins; demethylation; cyclisation; hard-soft interactions

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Cite This Article

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.

AMA Style

Gopalakrishnan G, Kasinath V, Pradeep Singh ND, Thirumurugan R, Sundara Raj SS, Shanmugam G. A New Synthetic Route to Dihydrobenzopyran Via Tandem Demethylation Cyclisation. Molecules. 2000; 5(6):880-885.

Chicago/Turabian Style

Gopalakrishnan, Geetha; Kasinath, Viswanathan; Pradeep Singh, N. D.; Thirumurugan, R.; Sundara Raj, S. S.; Shanmugam, G. 2000. "A New Synthetic Route to Dihydrobenzopyran Via Tandem Demethylation Cyclisation." Molecules 5, no. 6: 880-885.

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