Belfield, Andrew J. published the artcileSynthesis of Meta-substituted aniline derivatives by nucleophilic substitution, Quality Control of 350-19-6, the publication is Tetrahedron (1999), 55(46), 13285-13300, database is CAplus.
Substitution by amines of fluorobenzenes containing a meta-substituted electron withdrawing group (EWG), in DMSO at 100°C over 60 h gave meta-substituted aniline derivatives in isolated yields of up to 98%. The scope of the reaction is explored in terms of reaction conditions and substrates. It is postulated that facile meta-substitutions are facilitated through field stabilization of the intermediate anion by EWG substituents.
Tetrahedron published new progress about 350-19-6. 350-19-6 belongs to esters-buliding-blocks, auxiliary class Fluoride,Benzene,Ester, name is Ethyl 3,5-difluorobenzoate, and the molecular formula is C9H8F2O2, Quality Control of 350-19-6.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics