Table 1. Optimization of CM reaction between vinyl dioxolane (7) and 1-dodecene (8).

Entry	2 (mol%)	7 Equiv.	Conc. (M)	Yield a (%)	Z-Selectivity a (%)
1	5	6	0.5	84	93
2	5	4	0.5	87	94
3	5	2	0.5	80	95
4	2	4	0.5	83	95
5	2	4	0.3	92	94
6	2	2	0.5	80	95
7	2	2	1.0	66	95
8	2	2	0.3	82 [87] b	95 [94] b
9	1	2	0.5	74	95

^aYield and Z-selectivity determined by GC using tridecane as an internal standard; average of two experiments.

^bValue at 7 hours.