Catalytic dehydrocoupling of Me2NHBH3 by aluminium catalysts.
Entry | Catalyst | Loading/mol% | Time/hr | Temp/°C | Conversiona/% | Product distributionb/% | |||
---|---|---|---|---|---|---|---|---|---|
A | B | C | D | ||||||
1 | 3 | 5 | 5 | 20 | 72 | 25 | 5 | — | 27 |
2 | 3 | 5 | 44 | 20 | 78 | 35 | 5 | — | 23 |
3 | 3Si | 5 | 16.5 | 20 | 17 | 5 | 1 | — | 11 |
4 | 3 | 1 | 2 | 20 | 28 | 8 | 1 | <1 | 13 |
5 | 3 | 1 | 16.5 | 20 | 60 | 45 | 1 | <1 | 14 |
6 | 1 | 5 | 24 | 20 | 0 | 0 | 0 | 0 | 0 |
7 | 1 | 5 | 24 | 60 | 31 | 11 | — | — | 15 |
Conversion of Me2NHBH3 based on 11B NMR integrals.
Ratio of products based on 11B NMR integrals.