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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 28, 1998 - Issue 9
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Original Articles

A Convenient Procedure for the Synthesis of 4,6-Disubstituted 2-OXO-2H-Pyran-5-carboxylic Esters.

Adrián Covarrubias-Zúñiga Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, México, D.F., México
,
Luis A. Maldonado Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, México, D.F., México
&
José Díaz-Domínguez Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, México, D.F., México
Pages 1531-1537 | Received 03 Nov 1997, Published online: 22 Aug 2006
 
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Abstract

A simple procedure for the synthesis of 2H-pyran-2-ones 2a is described: The initial Michael addition product of β-ketoester anions with acetylenic esters readily cyclizes under the basic reaction conditions to give the α-pyrones 2a (Scheme 2).

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