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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 2, 1972 - Issue 5
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Original Articles

Synthesis of Acylacetylenes from α-Diazo-β-Hydroxylcarbonyl Compounds

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Pages 331-334 | Received 30 Jun 1972, Published online: 05 Dec 2006
 

Abstract

A facile synthesis of α-diazo-β-hydroxy ketones and esters by the condensation of aldehydes or ketones with acyldiazomethanes was reported recently.2 Exposure of the trifunctional compounds to boron trifluoride in ether-acetonitrile solution leads to acylacetylenes. Thus substances 1 and 3 were converted readily into acetylenes 2 and 4 respectively.3 This makes available a simple two-step procedure for the synthesis of conjugated acetylenic carbonyl compounds.

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