The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one( cas:7661-33-8 ) is researched.Formula: C10H10ClNO.Waly, Mohamed A.; Yossif, Shiam A.; Ibrahim, Ismail T.; Sofan, Mamdouh A. published the article 《Efficient Synthesis of N-Substituted 2,4-Azepandione Ring System as an Active Intermediate for Heterocyclic Syntheses》 about this compound( cas:7661-33-8 ) in Journal of Heterocyclic Chemistry. Keywords: azepandione preparation; butanoate acetylarylamino ethyl cyclization. Let’s learn more about this compound (cas:7661-33-8).
An improved efficient synthesis for 2,4-azepandiones I [R = H, CH3, Cl; R1 = H, CO2CH3] could be achieved by a careful control of the reaction conditions to cyclize Et 4-(N-acetylarylamino)butanoates 4-R-2-R1C6H3N[(CH2)3CO2CH2CH3]C(O)CH3, resp. Et 4-arylamino butanoates 4-R-2-R1C6H3NH(CH2)3C(O)2CH2CH3 was prepared by stirring the Et 4-bromobutanoate and substituted anilines 4-R-2-R1C6H3NH2 at room temperature Then, they were acetylated with acetyl chloride and triethylamine under the conditions that avoid the formation of 2-pyrrolidinone derivatives II. Due to the rapid decomposition of Et 4-(N-acetylarylamino)butanoates to Et 4-arylaminobutanoates, the reaction mixture was directly transferred without workup to the next cyclization step. The azepandione synthesis was favored by using a weak base at low temperature, where it was in a competition with the other modes of ring closure. The structures of the new compounds were supported by correct anal. and spectral data.
There is still a lot of research devoted to this compound(SMILES：O=C1N(C2=CC=C(Cl)C=C2)CCC1)Formula: C10H10ClNO, and with the development of science, more effects of this compound(7661-33-8) can be discovered.
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