chemical entities. The metathesis, typically involving the participation of at least two-carbon-or one-carbon-plus-one-hydrogen-derived covalent bonds, can be divided into three broad categories based on the use of two descriptors: elemental connectivity and bonding modes. The metathesis with an identical set of both elemental connectivity and bonding modes before and after the molecular fragment exchange process is termed as "homomorphic metathesis" (e.g., olefinolefin metathesis, olefin-carbonyl metathesis) (Scheme 2A) and as "heteromorphic metathesis" (Scheme 2B,C) otherwise. The metathesis with a different set of elemental connectivity (and naturally, a different set of bonding modes) upon molecular fragment exchange is termed as "connectivity-heteromorphic metathesis" (e.g., Wittig reaction) (Scheme 2B). The metathesis with an identical set of elemental connectivity but a different set of bonding modes upon molecular fragment exchange is termed as "bonding-heteromorphic metathesis" (e.g., olefin-imine metathesis described herein) (Scheme 2C). The primary aminebearing enaminone products can be facilely elaborated into structurally diverse families of compounds, showcasing the vast enabling utility of our synthetic tool.