How is 4-Methylhept-4-en-1-yn-3-yl 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropanecarboxylate (CAS: 54406-48-3) typically synthesized?

4-Methylhept-4-en-1-yn-3-yl 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropanecarboxylate can be synthesized via an addition reaction of a 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropanecarboxylic acid derivative with 4-methylhept-4-en-1-yne, catalyzed by a transition metal complex. The reaction is typically performed under mild conditions, and the product is isolated using standard techniques such as column chromatography. The yield is around 75% with good selectivity.