rac-4-{(E)-[1-Cyano-1-cyclo-hexyl-2-(1H-indol-3-yl)eth-yl]imino-meth-yl}benzonitrile.
A phosphine-catalysed addition of gramine to an alkyl-idene-amino-nitrile gives the title compound, C(25)H(24)N(4), in good yield. In the crystal, pairs of mol-ecules are connected via N-H⋯N hydrogen bonds into inversion dimers. The mol-ecules are characterized by a planar indole moiety [maximum deviation = 0.012 (1) Å], a chair conformation of the cyclo-hexane ring and an anti-periplanar conformation of the H atom on the cyclo-hexane and the adjacent cyano group.
University Mainz, Duesbergweg 10-14, 55128 Mainz,  Germany.
Julien
J
Letessier
Dieter
D
Schollmeyer
Heiner
H
Detert
Till
T
Opatz