Additional information
Description | 5-Hexynoic acid, an alkynoic acid, undergoes gold-catalyzed cyclization to produce methylene lactones.[1] It is also used in the preparation of various compounds, including 5-hexynoic acid methyl ester , 5,6-dicarba-closo-dodecaboranyl hexynoic acid , 5,8,11-dodecatriynoic acid , and 5-isocyanato-1-pentyne . |
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Reference | [1]A mild access to γ- or δ – alkylidene lactones through gold catalysis. |