Table 1.

Examination of Ketoimines Bearing Different N-aryl Groups^a

entry	G	temp (°C)	conv (%)b	anti:synb	er; ee (%)c
1		+4	68	<2:>98	63.5:36.5; 27
2		−15	45	<2:>98	67:33; 34
3		−30	20	<2:>98	64.5:35.5; 29
4		−78	<2	nd	nd
5		−78	>98	93:7	95.5:4.5; 91
6		−78	>98	80:20	89.5:10.5; 79
7		−78	43	8:92	77.5:22.5; 55

^aReactions performed under N₂ atmosphere.

^bConversion levels and diastereomeric ratios were determined by analysis of 400 MHz ¹H NMR spectra of unpurified products.

^cEnantiomeric ratio (er) values were determined by chiral HPLC analysis; see the Supporting Information for details.

nd = not determined.