Table 4.

Additions to β-Substituted Cyclic Dienones^a

entry	allylsilane product	yield (%)b	Z:E c	erd
1e		85	78:12	95:5
2		91	95:5	98:2
3		95	>98:2	95:5
4		91	>98:2	97:3
5		88	>98:2	94.5:5.5
6		92	95:5	98:2
7		95	<2:>98	96:4
8		98	96:4	96:4

^aSee Table 3.

^bSee Table 3.

^cSee Table 3.

^dSee Table 3.

^eProduct mixture contained 15–20% of the isomerized α,β-unsaturated ketone. See the SI for details.