Table 2.

Ring closing metathesis on cycloheptenones to generate bi- and tricyclic products.^a

entry	substrate (1)	R1	product (17)		yield (%)b
1c	1h		17a 17b	R2 = H	93
2	1i			R2 =	99
3d	1c		17c 17d	R2 = H	91
4d	1d			R2 = Me	90
5	1e		17e 17f	R2 = H	90
6	1f			R2= Me	98
7e	1j		17g		96
8	1g		17h		99

^aConditions: cycloheptenone 1 (1.0 equiv) and Grubbs–Hoveyda 2^nd generation catalyst (5.0 mol %) in benzene, 50 °C.

^bYield of isolated product.

^cSee Supporting Information for alternative reaction parameters.

^d1,4-benzoquinone (10 mol %) added.

^ePerformed in toluene.