Table 2.

α-Selective Ni-Catalyzed Hydroalumination of Arylacetylenes^a

entry	aryl	temp (°C)	time (h)b	conv (%)c	α:βc
1	o-OMeC6H4	4	12	>98	98:2
2	m-OMeC6H4	22	2	>98	>98:2
3	p-OMeC6H4	4	12	>98	>98:2
4	m-CF3C6H4	4	12	>98	95:5
5	p-CF3C6H4	22	2	>98	97:3
6	p-FC6H4	22	2	>98	>98:2
7	o-ClC6H4	22	2	>98	>98:2
8	o-BrC6H4	22	2	>98	>98:2
9	o-MeC6H4	4	12	>98	>98:2
10	3-pyridyl	22	2	>98	>98:2
11	3-pyridyl	22	2	>98	>98:2

^aReactions under N₂ atm.

^bReaction times correspond to hydroalumination portion of the process (not including D₂O quench).

^cBy analysis of 400 MHz ¹H NMR spectra of unpurified mixtures (after D₂O); <2% alkynylaluminum observed.