Table 1.
Compound | R1 | R2 | Yield (%) |
---|---|---|---|
5 | H | CH2Ph | - |
6 | CH2Ph | H | - |
7 | H | CH2CH2Ph | - |
8 | H | CH(CH3)2 | - |
9 | H | CH2OCH2Ph | - |
10 | H | CH2Ph | 79 |
11 | CH2Ph | H | 91 |
12 | H | CH2CH2Ph | 92 |
13 | H | CH(CH3)2 | 96 |
14 | H | CH2OCH2Ph | 97 |
15 | H | CH2Ph | 76 |
16 | CH2Ph | H | 72 |
17 | H | CH2CH2Ph | 74 |
18 | H | CH(CH3)2 | 70 |
19 | H | CH2OCH2Ph | 73 |
(i) LiAlH4, THF, 16 h, reflux. (ii) TfN3, DMAP, DCM, 15 h, RT.