Entry
Catalyst
Conv. (%) Yield 2aa (%) Yield 3aa (%) Yield 4aa (%)
1 Cu(OTf)2 < 5 trace ND ND
2 Ni(cod)2 < 5 ND ND ND
3 Ni(acac)2 < 5 ND ND ND
4 Ti(OiPr)4 10 trace ND ND
5 Rh(cod)(acac) 10 trace trace trace
6 CoBr2/bpy < 5 trace ND ND
7
CoF2/ tBuXantphos
< 5
trace
ND
ND
8 L1-FeCl2 > 95 88(69) trace trace
9 L2-FeCl2 > 95 93 trace trace
10 L3-FeCl2 > 95 93(91) trace trace
11 L4-FeCl2 > 95 90 trace trace
12 L5-FeCl2 > 95 94 trace trace
13 L6-FeCl2 > 95 82(76) 5 6
14 L7-FeCl2 91 56 5 6
15 L8-FeCl2 38 24 trace trace
16b L9-FeCl2 > 95 22 trace trace
17 L10-FeCl2 67 35 trace trace
18 FeCl2 < 5 trace ND ND
19 L3 < 5 trace ND ND