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C–C Bond Breaking in Addition–Elimination Reactions on Nitriles
Author(s) -
Mattalia JeanMarc,
Nava Paola
Publication year - 2019
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201900119
Subject(s) - carbanion , steric effects , imine , chemistry , adduct , nucleophilic addition , nucleophile , addition reaction , double bond , medicinal chemistry , computational chemistry , stereochemistry , organic chemistry , catalysis
The nucleophilic addition of organometallics to nitriles leads to an imine‐type intermediate. When the α‐position is substituted with a carbanion stabilizing group, an elimination can follow, resulting in a C–C bond breaking. This paper proposes a computational study of this step. Starting from the transnitrilation reaction by DMMN (dimethylmalononitrile), a comparison of several methods shows that the PBE0‐D3 level is suitable for this study. The imine adducts display particularly stretched C–C bond and thus the computed barriers are low. Both electronic and steric effects influence the leaving group ability as well as its interaction with the metal.