Synthesis of Mono- and Diunsaturated Esters of TADDOL

Darío C. Gerbino; Sandra D. Mandolesi; Liliana C. Koll; Julio C. Podestá

doi:10.1055/s-2005-872123

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Synthesis of Mono- and Diunsaturated Esters of TADDOL

Darío C. Gerbino^a,b, Sandra D. Mandolesi^a, Liliana C. Koll*^a,c, Julio C. Podestá*^a,c
^a Universidad Nacional del Sur, Departamento de Química, Avenida Alem 1253, 8000 Bahía Blanca, Argentina
^b Comisión de Investigaciones Científicas (CIC), Provincia de Buenos Aires, Argentina
^c Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad de Buenos Aires, Argentina
Fax: +54(291)4595187; e-Mail: jpodesta@uns.edu.ar;

Abstract

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Abstract

The synthesis of fourteen new mono- and diesters of (4R,5R)-2,2-dimethyl-α,α,α′,α′-tetraphenyl-1,3-dioxolane-4,5-dimethanol (TADDOL) is reported. This study shows that esterifications of TADDOL (1) with acid chlorides, derived from normal and α,β-unsaturated carboxylic acids, in the presence of n-butyllithium (BuLi) can lead to both mixtures of the corresponding mono- and diesters, the latter in higher yield, and to just the diesters, depending on the structure of the starting acids. These reactions take place in most cases in good to excellent overall yields (57-95%). The reaction between a dichloro derivative of TADDOL and the silver salts of α,β-unsaturated acids also gives the corresponding unsaturated diesters of TADDOL in good yields.

Key words

TADDOL - α,β-unsaturated esters - butyllithium - unsaturated acid silver salts

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Referenzen

References

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