Table 3. CM of vinyl dioxolane (7) and 1-dodecene (8) using various Ru-metathesis catalysts.

Entry	Catalyst	Yield a (%)	Z-Selectivity a (%)
1	1	87	76
2	2	92	94
3	3	96	10
4	4	92	5

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