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. |

![(S)-2,2'-([1,1'-binaphthalene]-2,2'-diylbis(oxy))bis(2-methylpropanoic acid)](https://crolaboratories.com/wp-content/uploads/2018/04/H171032-2.png)

