Table 3.

Phosphine-Catalyzed Asymmetric Synthesis of Benzylic Ethers: Scope with Respect to the Alcohol^a

entry	H–OR	ee (%)	yield (%)b
1		95	90
2		94	88
3c		91	86
4		94	88
5		91	86
6c		93	74
7d	HOMe	92	88
8		96	82
9		96 (95e)	64 (79e)
10		96	75

^aAll data are the average of two experiments.

^bYield of purified, isolated product.

^cAmount of nucleophile: 2.0 equiv.

^dThe methyl, rather than the t-butyl, ester of the alkynoate was used.

^eCatalyst loading: 20% (S)–1.