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Obydennik AY, Titov AA, Listratova AV, Borisova TN, Rybakov VB, Voskressensky LG, Varlamov AV. Concise and Free-Metal Access to Lactone-Annelated Pyrrolo[2,1- a]isoquinoline Derivatives via a 1,2-Rearrangement Step. Int J Mol Sci 2024; 25:1085. [PMID: 38256158 PMCID: PMC10816086 DOI: 10.3390/ijms25021085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
Here, An efficient approach to obtaining previously unknown furo[2',3':2,3]pyrrolo[2,1-a]isoquinoline derivatives from readily available 1-R-1-ethynyl-2-vinylisoquinolines is described. The reaction features a simple procedure, occurs in hexaflouroisopropanol and does not require elevated temperatures. It has been found that the addition of glacial acetic acid significantly increases the yields of the target spirolactone products. Using trifluoroethanol instead of hexaflouroisopropanol results in the formation of pyrido[2,1-a]isoquinolines.
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Affiliation(s)
- Arina Y. Obydennik
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia; (A.Y.O.); (A.A.T.); (A.V.L.); (T.N.B.); (A.V.V.)
| | - Alexander A. Titov
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia; (A.Y.O.); (A.A.T.); (A.V.L.); (T.N.B.); (A.V.V.)
| | - Anna V. Listratova
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia; (A.Y.O.); (A.A.T.); (A.V.L.); (T.N.B.); (A.V.V.)
| | - Tatiana N. Borisova
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia; (A.Y.O.); (A.A.T.); (A.V.L.); (T.N.B.); (A.V.V.)
| | - Victor B. Rybakov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, Moscow 119991, Russia;
| | - Leonid G. Voskressensky
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia; (A.Y.O.); (A.A.T.); (A.V.L.); (T.N.B.); (A.V.V.)
| | - Alexey V. Varlamov
- Organic Chemistry Department, Science Faculty, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia; (A.Y.O.); (A.A.T.); (A.V.L.); (T.N.B.); (A.V.V.)
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