Table 2. Phosphine-Catalyzed Doubly Stereoconvergent γ-Additions: Scope with Respect to the Allenoate^a.

^aAll data are the average of two experiments.

^bYield of purified product, isolated as a mixture of diastereomers.

^cDetermined through analysis by ¹H NMR spectroscopy of the unpurified reaction mixture.

^dee of the major diastereomer.

^eCatalyst loading: 10%.