Zahra, Jalal A. published the artcileSynthesis of some ethyl 3-(aryldiazenyl)-7-oxodihydropyrido[2,3-f]quinoxaline-8-carboxylates, Category: esters-buliding-blocks, the publication is Zeitschrift fuer Naturforschung, B: Chemical Sciences (2007), 62(8), 1045-1051, database is CAplus.
Et 7,8-diamino-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate (6) and its free acid were prepared by chem. reduction of the resp. 7-azido-8-nitroquinoline. Consecutive nucleophilic addition and cyclocondensation reactions of 6 with α-acetyl-N-arylhydrazonoyl chlorides in EtOH and NEt3 are site-selective and yield the corresponding 3-(arylazo)-2-methylpyrido[2,3-f]quinoxalines.
Zeitschrift fuer Naturforschung, B: Chemical Sciences published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C8H5F3O3, Category: esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics