Table 2. Formation of 11 and Desulfonylation To Give 12.
entry | R1 | R2 | 11, yield (dr) | 12, yield (dr) |
---|---|---|---|---|
1 | Bn | Ph | 11a, 66% (>95:5) | 12a, 76% (>95:5) |
2 | n-Pr | 3,5-(MeO)2C6H3 | 11b, 57% (>95:5) | 12b, 77% (90:10) |
3 | CH3 | Ph | 11c, 67% (>95:5) | 12c, –a |
Desulfonylation of 11c yielded a mixture of products as determined by NMR spectroscopy.