Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2,3-Dihydrocinnolin-4(1H)-one hydrochloride, is researched, Molecular C8H9ClN2O, CAS is 137195-33-6, about Synthesis and action on the central nervous system of some N2-substituted cinnoline derivatives.Reference of 2,3-Dihydrocinnolin-4(1H)-one hydrochloride.
Alkylation of 4-hydroxycinnolines using Et bromoacetate resulted in N2-substituted acetic acids. These acids were converted to esters and amides. Some of the obtained acids were reduced with zinc dust to give 4-oxo-1,2,3,4-tetrahydro-2-cinnolineacetic acids. Several of the compounds were tested for their effect on central nervous system.
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Reference:
Cinnoline – Wikipedia,
Cinnoline – an overview | ScienceDirect Topics