ChemInform Abstract: Bargellini Condensation of Coumarins. Expeditious Route to o-Carboxyvinylphenoxyisobutyric Acids and Application to the Synthesis of Sesquiterpenes Helianane, Heliannuol A and Heliannuol C

Autor:	Ramanathapuram V. Venkateswaran, Bidyut Biswas, Prabir K. Sen
Rok vydání:	2008
Předmět:	Terpene chemistry.chemical_compound Chloroform chemistry Aqueous sodium hydroxide Condensation Acetone Organic chemistry General Medicine
Zdroj:	ChemInform. 39
ISSN:	1522-2667 0931-7597
DOI:	10.1002/chin.200812192
Popis:	The direct Bargellini condensation of coumarins involving reaction with chloroform and acetone in the presence of aqueous sodium hydroxide furnished o -carboxyvinylphenoxyisobutyric acids in good yields. The utility of this new useful protocol was demonstrated by the transformation of the three diesters 9b , 9f and 9g to the sesquiterpenes helianane 4 , heliannuol A 2 and heliannuol C 3 , respectively.
Databáze:	OpenAIRE
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