Table 1.

Allylation reactions of 3,3-disubstitued allylzinc species with various aldehydes.^[a]

	Starting material	R1	R2	R3	Product	Yield [%][b]	d.r.[c]
1	3a	Hex	Et	p-BrH4C6	7a	71	97:3
2	3b	Et	Hex	p-BrH4C6	7b	55	90:10
3	3c	Hex	Bu	p-BrH4C6	7c	60	98:2
4	3d	Bu	Et	p-BrH4C6	7d	70	92:8
5	3e	Me	Et	p-BrH4C6	7e	52	90:10
6	3a	Hex	Et	p-MeH4C6	7 f	60	98:2
7	3d	Bu	Et	H5C6	7g	70	98:2
8	3d	Bu	Et	p-OAcH4C6	7h	63	88:12
9	3d	Bu	Et	p-MeO2CH4C6	7i	65	88:12
10[d]	3b	Hex	Et	nBu	7j	70	96:4
11[d]	3a	Et	Hex	nBu	7k	66	91:9
12[d]	3d	Bu	Et	Ph(CH2)2	7l	62	83:17
13[d]	3d	Bu	Et	iPr	7m	41	80:20

^[a]Hex=hexyl.

^[b]Determined after purification by column chromatography on alumina.

^[c]Determined by analysis of the crude product by ¹H NMR spectroscopy and gas chromatography.

^[d]For aliphatic aldehydes, the allylation reaction proceeds at −40°C and the increased temperature can explain the lower diastereoselectivity.