Table 1.
Reaction parameters for the catalytic dehydrocoupling of dimethylamine borane 2 a (c0=850 mm) with magnesocenophanes 1 a–d, magnesocene (Cp2Mg), and di‐n‐butylmagnesium (nBu2Mg) under ambient conditions.
|
(Pre)catalyst (loading [mol %]) |
Reaction time [h] |
Solvent |
Conversion [%] |
TON/TOF [h−1] |
|---|---|---|---|---|
|
1 a (5) |
16 |
dme |
≥95 |
20/1.2 |
|
1 a (10) |
8 |
dme |
90 |
9/1.1 |
|
1 a (3) |
24 |
dme |
52 |
17/0.7 |
|
1 a (3) |
48 |
dme |
≥95 |
31/0.6 |
|
1 a (5) |
24 |
thf |
42 |
8/0.3 |
|
1 a (5) |
24 |
Et2O |
28 |
6/0.2 |
|
1 a (5) |
24 |
C6H4F2 |
17 |
4/0.2 |
|
1 a (5) |
24 |
C6D6 |
15 |
3/0.1 |
|
1 b (5) |
16 |
dme |
76 |
15/0.9 |
|
1 b (5) |
24 |
dme |
≥95 |
19/0.8 |
|
1 c (5) |
24 |
dme |
50 |
10/0.4 |
|
1 d (5) |
24 |
dme |
23 |
5/0.2 |
|
Cp2Mg (5) |
16 |
dme |
75 |
14/0.9 |
|
Cp2Mg (5) |
24 |
dme |
≥95 |
16/0.7 |
|
nBu2Mg (5) |
24 |
dme |
≤5 |
– |