1
|
Šegan S, Jevtić I, Tosti T, Penjišević J, Šukalović V, Kostić-Rajačić S, Milojković-Opsenica D. Determination of lipophilicity and ionization of fentanyl and its 3‑substituted analogs by reversed-phase thin-layer chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1211:123481. [DOI: 10.1016/j.jchromb.2022.123481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/12/2022] [Accepted: 09/20/2022] [Indexed: 11/30/2022]
|
2
|
Synthetic route towards 1,2,3,4-tetrahydroquinoxaline/piperidine combined tricyclic ring system. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2022. [DOI: 10.2298/jsc210416068k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The synthetic route toward novel tricyclic, nitrogen-containing system is disclosed. Three novel compounds possessing structural features of 1,2,3,4-tetrahydroquinoxaline and decahydropyrido[3,4-b]pyrazine are synthesized starting from readily available precursors in six or seven steps, of which the last three or four steps respectively are diastereoselective. Key reaction steps include N-acylation, Hofmann rearrangement and ring-closing Buchwald? Hartwig reaction. Compounds trans-8, cis-12 and trans-12 are synthesized in order to prove that this novel, tricyclic system can be functionalized with various groups. Synthetic significance of this heterocyclic system lies in the possibility for the orthogonal functionalization of three different amino groups, allowing fine structural tuning.
Collapse
|