Table 2.

Selective Synthesis of endo-Carbocyclic Dienes by Mo-Catalyzed Enyne RCM (Acetonide Tether)^a-^d

entry	substrate	endo product	exo product	endo:exob	yield (%)c
1				>98:<2	81
2				75:25	75d
3				66:33	72d
4				>98:<2	81

^aReactions were performed under N₂ atmosphere with 5 mol % 5 for 30 min in C₆H₆ at 22 °C.

^bRatios were determined by analysis of 400 MHz ¹H NMR spectra of unpurified mixtures prior to purification.

^cYield of isolated products after purification.

^dCombined yields of the product mixture.