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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 26, 1996 - Issue 7
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Original Articles

Improvements in Methylation of Diospyrol by Solvent-Free Phase Transfer Catalysis

Ma Tuan Khanh Department of Chemistry, University of Ho Chi Minh City, 227 Nguyen Van Cu Street, Ho Chi Minh City, Viet-Nam
,
Tran Kim Qui Department of Chemistry, University of Ho Chi Minh City, 227 Nguyen Van Cu Street, Ho Chi Minh City, Viet-Nam
,
Nguyen Thanh Hong Institute of Chemical Technology, 1 Mac Dinh Chi Street, Ho Chi Minh City, Viet-Nam
&
André Loupy Laboratoire des Réactions Sélectives sur Supports, associé au CNRS, Université de Paris-Sud, B[acaron]timent, 410,91405, Orsay, France
Pages 1305-1308 | Received 18 Sep 1995, Published online: 15 Aug 2006
 
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Abstract

Permethylation of diospyrol was considerably improved in solvent-free PTC conditions. An excellent yield (92%) was obtained in 30 minutes using solid KOH + 5% Aliquat 336 and dimethyl sulfate, to be compared with 40% in acetone in 10 hours.

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