Rearrangements Encountered in the Attempted Syntheses of Pyridoazepinone Carboxylic Acids was written by Sanders, William J.;Zhang, Xiaolin;Wagner, Rolf. And the article was included in Organic Letters in 2004.Application In Synthesis of Ethyl 3-(2,6-Dichloro-5-fluoro-3-pyridyl)-3-oxopropionate This article mentions the following:
Attempts to synthesize pyridoazepinone carboxylic acids by standard methodologies resulted exclusively in unusual and unexpected rearrangement products. Seven-membered ring formation was attempted by ring expansion of a six-membered ring and by aldol ring closure. In each case, the major product resulted from rearrangement of the starting material without detection of the desired product. Ultimately, an isomeric pyridoazepinone Et ester was prepared; however, attempted saponification resulted in another unusual rearrangement. In the experiment, the researchers used many compounds, for example, Ethyl 3-(2,6-Dichloro-5-fluoro-3-pyridyl)-3-oxopropionate (cas: 96568-04-6Application In Synthesis of Ethyl 3-(2,6-Dichloro-5-fluoro-3-pyridyl)-3-oxopropionate).
Ethyl 3-(2,6-Dichloro-5-fluoro-3-pyridyl)-3-oxopropionate (cas: 96568-04-6) belongs to organic chlorides. Organochlorines stimulate the central nervous system and cause convulsions, tremor, nausea, and mental confusion. Examples are dichlorodiphenyltrichloroethane (DDT), chlordane, lindane, endosulfan, and dieldrin. Alkyl chlorides readily react with amines to give substituted amines. Alkyl chlorides are substituted by softer halides such as the iodide in the Finkelstein reaction.Application In Synthesis of Ethyl 3-(2,6-Dichloro-5-fluoro-3-pyridyl)-3-oxopropionate
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics