How is Methyl 2-nonynoate (CAS: 111-80-8) typically synthesized?

Methyl 2-nonynoate is typically synthesized via an esterification reaction of 2-methyl-2-hexen-4-yne with methanol in the presence of an acid catalyst, such as sulfuric acid. The reaction conditions include a temperature range of 100-120°C and a yield of up to 85% is often achieved. This process requires careful control of the reaction temperature to avoid side reactions.