Table 1. Reaction Conditions for the C–H Olefination of (±)-16.

entry	temp. (°C)	x	time (h)	1H NMR yielda
1	80	1.5	16	49%
2	60	1.5	16	31%
3	80	1.5	6	45%
4	80	1.0	16	42%
5	80	2.0	16	54% (59%b,c+ 5%b,d)
6e	80	1.5	16	55%

^a1H NMR yield of the desired regioisomer was determined by using CH₂Br₂ as the internal standard.

^bIsolated yield.

^cRegioselectivity was determined from the crude mixture: A/B = 6:1.

^dDiolefinated product.

^e15 mol % of Pd(OAc)₂ and S,O-ligand were used.