Imidazole
SMARTS: [C;$(C([#6])[#6;!$([#6]Br)]):4](=[OD1])[CH;$(C([#6])[#6]):5]Br.[#7;H2:3][C;$(C(=N)(N)[c,#7]):2]=[#7;H1;D1:1]>>[C:4]1=[CH0:5][NH:3][C:2]=[N:1]1
Conditions
Reactant 1: alpha-halo ketone.
Reactant 2: amidine.
R1, R2: aryl, alkyl, vinyl. R3: aryl, N.
References
K. Hirano, S. Urban, C. Wang, F. Glorius, Org. Lett., 2009, 11, 1019-1022.
Other sources
Organic chemistry