Table 2. Reactivity of 1a and Its Analogs.

entry	R	3aa [%]a	RME [%]b
1	isopropenyl (1a)	88	66
2	H	12	11
3	Me	1	1
4	Ph	83	57
5	Vinyl	54	43

^aYield of 3aa was determined via GC analysis using n-tetradecane as an internal standard.

^bReaction mass efficiency.