Table 3.
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---|---|---|---|---|
entry | R | PG | yield (%) | ee (%) |
1 | Me | Bn | 96 | > 99 |
2 | Bn | Bn | 96 | > 99 |
3c | Allyl | Bn | 92 | > 99 |
4 | H | Bn | 80 | 90 |
5 | H | Me | 98 | 93 |
6 | H | H | 86 | 95 |
7 | Me | H | 92 | > 99 |
8 | Me | Me | 96 | 97 |
Absolute configuration assigned by chemical correlation or analogy.
Enantiomeric excess determined by chiral HPLC analysis.
Reaction performed at rt.