Fig. 1: Asymmetric synthesis of pyramidal molecules.
From: The asymmetric synthesis of an acyclic N-stereogenic amine

a, Approaches to P-stereogenic phosphines, S-stereogenic sulfoxides and bridged O-stereogenic oxonium ions have been established. By contrast, acyclic N-stereogenic amines have not been synthesized previously. b, Examples of configurationally stabilized acyclic, tertiary amines. c, Catalytic asymmetric addition of a silyl ketene acetal to an in situ-generated silylnitronium ion (this work).