Table 8. Control experiments for the regio- and stereoselective Rh(i)-catalyzed [(2+2)+2] carbocyclization reaction with 1,6-enynes with racemic allylic alcohols.

Entry	R	n	Yield (%)	ee (%)
1a	H	1	60	98
2	Me	1	0	—
3	H	2	0	—

^a dr = (R, 5S, 7aR) : (S, 5R, 7aR) : {two unspecified diastereoisomer} = 7 : 2.5 : 1.