Table 3.
entry | Nu–SiMe3 | Na | product | cis:transb,c | yieldd |
---|---|---|---|---|---|
1 | 7 | 1.8 | 13 | 1:99 | 67 |
2 | 8 | 6.2 | 14 | 2:98 | 83 |
3 | 9 | 8.2 | 15 | 17:83 | 93 |
4 | 11 | 10.2 | 16 | 34:66 | 69 |
N = nucleophilicity parameter; see ref 17.
Determined by GC and 1H NMR spectroscopic analysis of the unpurified reaction mixture.
Diastereoselectivities were independent of starting anomer ratio.
Isolated yield.