Table 4.

Reaction of Various Allyl Enol Carbonates^a

entry	substrate	product	yieldb eec	Lit,d yield, ee
1			88% 99.7% ee R-(+) e	99% 88% ee R-(+)
2			94% 91% ee f (−)	90% 6% ee (+)
3			98% 76%ee (+)	79% 38% ee (+)
4			64% 82% ee (+)	59% 45% ee (−)
5			99% 95% ee (+)	98% 82% ee (−)

^aAll reactions were performed on a 0.3 mmol scale at 0.1 M in toluene at 23 °C for 20 h using 2.5 mol% 20 and 5.5 mol% ligand (R,R)-L4.

^bIsolated yields.

^cEe values were determined by HPLC on a chiral stationary phase.

^dConditions used were 2.5 mol% [(η³-C₃H₅)PdCl]₂, 5.0 mol% (S,S)-L1, 2.0 equiv LDA, 1.0 equiv Me₃SnCl, DME, r.t.¹⁰

^eThe absolute configuration and the sign of the optical rotation ([α]_D) of the product.^9a

^fEe was determined by GC on a chiral stationary phase.