Table 4.

Initial Studies on Allylic Alkylations with Me₃Al in the Presence of N-Heterocyclic Lewis Base Catalysts^a

entry	Lewis base; (mol %)	conv (%)b	SN2′:SN2b	erc
1	none	5	62:38	–
2	6a; 5	10	80:20	66.5:33.5
3	6b; 5	<2	–	–
4	7; 2.5	<2	–	–

^aReactions were performed under N₂ atmosphere.

^bConversion and site-selectivity were determined by analysis of 400 MHz ¹H NMR spectra of product mixtures prior to purification.

^cEnantiomer ratios were determined by GLC analysis; see the Supporting Information for details.