1
|
Goswami G, Singh B, Wani IA, Mal A, Ghorai MK. A Synthetic Route to Tetrahydro-1 H-azepino[4,3,2- cd]indoles via Ring-Opening Cyclization of Activated Azetidines with 4-Bromoindole: Toward a Vasopressin V2 Receptor Antagonist. J Org Chem 2024; 89:11576-11587. [PMID: 39102588 DOI: 10.1021/acs.joc.4c01270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
A simple one-pot, two-step strategy for the synthesis of tetrahydro-1H-azepino[4,3,2-cd]indoles via Lewis acid-catalyzed SN2-type ring opening of activated azetidines with 4-bromoindole, followed by a Pd-catalyzed intramolecular C-N cyclization reaction, with good to excellent yields is described. Utilizing this protocol, the vasopressin V2 receptor antagonist precursor has been synthesized easily. Enantioenriched tetrahydro-1H-azepino[4,3,2-cd]indoles were obtained by starting from enantiopure azetidine.
Collapse
Affiliation(s)
- Gaurav Goswami
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Bharat Singh
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Imtiyaz Ahmad Wani
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Abhijit Mal
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Manas K Ghorai
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| |
Collapse
|
2
|
Rivera RM, Ferrin ZR, Lindsay VNG. Iron-Catalyzed Oxidative Rearrangement of Cyclopropanone Hemiaminals: General Access to Pyrroloindolones from Indoles. Org Lett 2024; 26:4738-4743. [PMID: 38809772 PMCID: PMC11212033 DOI: 10.1021/acs.orglett.4c01528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
A concise synthetic approach to medicinally relevant pyrroloindolones and related fused heterocycles is reported via the diastereoselective N-addition of unprotected indoles to readily accessible cyclopropanone equivalents. The resulting stable hemiaminals are shown to smoothly rearrange to pyrroloindolones in mild conditions using Fe(III) catalysis in the presence of inexpensive ammonium persulfate as a stoichiometric oxidant. Experimental evidence points toward the formation of a β-carboxylic radical intermediate prone to cyclization and oxidative rearomatization as the operative mechanistic pathway.
Collapse
Affiliation(s)
- Roger Machín Rivera
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Zack R. Ferrin
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Vincent N. G. Lindsay
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695
| |
Collapse
|
3
|
Hernández-Ibáñez S, Ortuño JF, Sirvent A, Nájera C, Sansano JM, Yus M, Foubelo F. Synthesis of Vicinal anti-Amino Alcohols from N- tert-Butanesulfinyl Aldimines and Cyclopropanols. J Org Chem 2024; 89:6193-6204. [PMID: 38613513 PMCID: PMC11077494 DOI: 10.1021/acs.joc.4c00198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/15/2024]
Abstract
The stereoselective synthesis of vicinal amino alcohols derivatives from 1-substituted cyclopropanols and chiral N-tert-butanesulfinyl imines is described. Cyclopropanols are easily prepared from carboxylic esters upon reaction with ethylmagnesium bromide in the presence of titanium tetraisopropoxide and undergo carbon-carbon bond cleavage by means of diethylzinc to produce, upon base deprotonation, enolized zinc homoenolates, which react with chiral sulfinyl imines in a highly regio- and stereoselective manner.
Collapse
Affiliation(s)
- Sandra Hernández-Ibáñez
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Juan F. Ortuño
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Ana Sirvent
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Carmen Nájera
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - José Miguel Sansano
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Miguel Yus
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Francisco Foubelo
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| |
Collapse
|
4
|
Paul T, Basak S, Nanjegowda MV, Punniyamurthy T. Biorelevant Weakly Coordinating Directing Group Assisted C-H Alkenylation with Cyclopropanols via Sequential C-H/C-C Activation. Org Lett 2023; 25:8975-8980. [PMID: 38071624 DOI: 10.1021/acs.orglett.3c03493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
A weakly coordinating biorelevant intrinsic directing group (DG) assisted site-selective C-H alkenylation via sequential C-H/C-C bond activation has been accomplished under Ru(II)-catalysis using readily accessible cyclopropyl alcohol as an alkenyl surrogate. Utilization of an intrinsic DG, exclusive regioselectivity, functional group diversity, late-stage natural product and drug mutations are the important practical features.
Collapse
Affiliation(s)
- Tripti Paul
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Shubhajit Basak
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | - Maniya V Nanjegowda
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India
| | | |
Collapse
|
5
|
Mandal S, Paul T, Karjee P, Barman M, Punniyamurthy T. Site-Selective C8-Alkylation of Quinolines with Cyclopropanols: Merging C-H/C-C Bond Activation. Org Lett 2023; 25:7805-7809. [PMID: 37870381 DOI: 10.1021/acs.orglett.3c02972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
The site-selective C8-alkylation of quinolines has been accomplished using cyclopropyl alcohols as the alkylating agents and N-oxide as a weak chelating group in the presence of Co(III) catalysis via merging C-H/C-C bond activation. The use of cyclopropanol as the alkyl source, Co catalysis, substrate scope, HRMS analysis of the reaction intermediate, and late-stage mutation of drug molecules/natural products are the important practical features.
Collapse
Affiliation(s)
- Santu Mandal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Tripti Paul
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Pallab Karjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Madhab Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | | |
Collapse
|
6
|
Jha N, Guo W, Kong WY, Tantillo DJ, Kapur M. Regiocontrol via Electronics: Insights into a Ru-Catalyzed, Cu-Mediated Site-Selective Alkylation of Isoquinolones via a C-C Bond Activation of Cyclopropanols. Chemistry 2023; 29:e202301551. [PMID: 37403766 DOI: 10.1002/chem.202301551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/01/2023] [Accepted: 07/05/2023] [Indexed: 07/06/2023]
Abstract
A site-selective C(3)/C(4)-alkylation of N-pyridylisoquinolones is achieved by employing C-C bond activation of cyclopropanols under Ru(II)-catalyzed/Cu(II)-mediated conditions. The regioisomeric ratios of the products follow directly from the electronic nature of the cyclopropanols and isoquinolones used, with electron-withdrawing groups yielding predominantly the C(3)-alkylated products, whereas the electron-donating groups primarily generate the C(4)-alkylated isomers. Density functional theory calculations and detailed mechanistic investigations suggest the simultaneous existence of the singlet and triplet pathways for the C(3)- and C(4)-product formation. Further transformations of the products evolve the utility of the methodology thereby yielding scaffolds of synthetic relevance.
Collapse
Affiliation(s)
- Neha Jha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, MP, India
| | - Wentao Guo
- Department of Chemistry, University of California-Davis, Davis, California, 95616, USA
| | - Wang-Yeuk Kong
- Department of Chemistry, University of California-Davis, Davis, California, 95616, USA
| | - Dean J Tantillo
- Department of Chemistry, University of California-Davis, Davis, California, 95616, USA
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, MP, India
| |
Collapse
|
7
|
Bisht R, Popescu MV, He Z, Ibrahim AM, Crisenza GEM, Paton RS, Procter DJ. Metal-Free Arylation of Benzothiophenes at C4 by Activation as their Benzothiophene S-Oxides. Angew Chem Int Ed Engl 2023; 62:e202302418. [PMID: 37000422 PMCID: PMC10953450 DOI: 10.1002/anie.202302418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/29/2023] [Accepted: 03/31/2023] [Indexed: 04/01/2023]
Abstract
Benzothiophenes, activated by oxidation to the corresponding S-oxides, undergo C-H/C-H-type coupling with phenols to give C4 arylation products. While an electron-withdrawing group at C3 of the benzothiophene is important, the process operates without a directing group and a metal catalyst, thus rendering it compatible with sensitive functionalities-e.g. halides and formyl groups. Quantum chemical calculations suggest a formal stepwise mechanism involving heterolytic cleavage of an aryloxysulfur species to give a π-complex of the corresponding benzothiophene and a phenoxonium cation. Subsequent addition of the phenoxonium cation to the C4 position of the benzothiophene is favored over the addition to C3; Fukui functions predict that the major regioisomer is formed at the more electron-rich position between C3 and C4. Varied selective manipulation of the benzothiophene products showcase the synthetic utility of the metal-free arylation process.
Collapse
Affiliation(s)
- Ranjana Bisht
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Mihai V. Popescu
- Department of ChemistryColorado State UniversityCenter AveFort CollinsCO80523USA
| | - Zhen He
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Ameer M. Ibrahim
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | | | - Robert S. Paton
- Department of ChemistryColorado State UniversityCenter AveFort CollinsCO80523USA
| | - David J. Procter
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| |
Collapse
|
8
|
Liu S, Su X, Jiang D, Xiong H, Miao D, Fu L, Qiu H, He L, Zhang M. Arylation of Cyclopropanol with Pyrrole: Asymmetric Synthesis of Indolizidine 167B, Indolizidine 209D, and Monomorine I. Org Lett 2023; 25:2058-2062. [PMID: 36930849 DOI: 10.1021/acs.orglett.3c00406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
A Fe(NO3)3-mediated ring-opening arylation of cyclopropanol with the electron-rich pyrrole has been developed, which might proceed through oxidative radical ring opening of cyclopropanol followed by cyclization to the pyrrole motif and then aromatization. This method enables direct arylation of cyclopropanol without prefunctionalization and thus allows rapid access to a diverse array of chiral 5,6,7,8-tetrahydroindolizines from easily available chiral amino acid esters. The synthetic utility has been demonstrated by the asymmetric synthesis of alklaoids (-)-indolizidine 167B, (+)-indolizidine 209D, (+)-monomorine I, and a natural product analogue.
Collapse
Affiliation(s)
- Shuangwei Liu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Xiaojiao Su
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Dan Jiang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Hongbing Xiong
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Dingyin Miao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Lin Fu
- Central Nervous System Drug Key Laboratory of Sichuan Province, Luzhou, Sichuan 646000, China
| | - Hanyue Qiu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China.,Central Nervous System Drug Key Laboratory of Sichuan Province, Luzhou, Sichuan 646000, China
| | - Ling He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China.,Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China
| |
Collapse
|
9
|
Chen W, Mao Y, Wang M, Ling F, Li C, Chen Z, Yao J. Rh(III)-catalyzed [4 + 1] cyclization of aryl substituted pyrazoles with cyclopropanols via C-H activation. Org Biomol Chem 2023; 21:775-782. [PMID: 36594518 DOI: 10.1039/d2ob02001g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A rhodium-catalyzed formal [4 + 1]-cyclization reaction of aryl substituted pyrazoles with cyclopropanols via C-H bond activation/cyclization processes to selectively construct a series of carbonyl functionalized pyrazolo[5,1-a]isoindoles is described. The reaction features good functional group compatibility and a broad substrate scope with respect to both cyclization components with up to 84% yields. Mechanistic studies indicated that the C-H cleavage might be the rate-determining step in this transformation.
Collapse
Affiliation(s)
- Wenxi Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China. .,College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China.
| | - Yan Mao
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China. .,College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China.
| | - Min Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China. .,College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China.
| | - Fei Ling
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Changchang Li
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China.
| | - Zhangpei Chen
- Center for Molecular Science and Engineering, College of Science, Northeastern University, Shenyang 110819, China.
| | - Jinzhong Yao
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China.
| |
Collapse
|