Table 2.

Synthesis of 3-trifluoromethyl-2-isoxazolines and isoxazoles by reaction between aldoxime 2 and olefins or alkynes in the presence of DIB.

entry	substrate	product	isolated yield (%)
1	5a	1a	76
2	5b	1b	90
3	5c	1c	91
4	5d	1d	64
5	5e	1e	51
6	5f	1f	56
7	5g	1g	82
8	5h	1h	74
9	5i	1i	24
10	5j	1j	20
11	5k	1k	traces
12	5l	1l	53
13	5m	1m	50
14	5n	1n	traces