Table 1.

Solvent and temperature screen

Entry	Solvent	T1, °C	T2, °C	Yield, %	ee, %
1	CH2CI2	23	0	85	81
2	THF	23	0	76	83
3	t-amyl alcohol	23	0	63	78
4	PhMe/t-amyl alcohol (9∶1)	23	0	87	86
5	PhMe	23	0	82	89
6	PhMe	23	23	75	86
7	PhMe	23	−10	60	90
8	PhMe	23	−40	64	92
9	PhMe	−40	NA	NR	NA

NA, not applicable; NR, no reaction.