Chiral spirocyclic phosphoric acid-catalyzed enantioselective synthesis of heterotriarylmethanes bearing an amino acid moiety?
RSC Advances Pub Date: 2023-06-22 DOI: 10.1039/D3RA03480A
Abstract
We present herein an enantioselective protocol for the chiral phosphoric acid-catalyzed addition of 3-arylisoxazol-5-amines to highly reactive 3-methide-3H-pyrroles to provide a diverse range of heterotriarylmethanes bearing an amino acid moiety in good yields (up to 97%) and high enantioselectivities (up to 93% ee) under mild conditions. The chiral spirocyclic phosphoric acid is crucial in converting the initial 1H-pyrrol-3-yl carbinols into reactive 3-methide-3H-pyrroles and obtaining the good enantiocontrol, thereby facilitating the desired enantioselective transformation.
Recommended Literature
- [1] Exceptionally high temperature spin crossover in amide-functionalised 2,6-bis(pyrazol-1-yl)pyridine iron(ii) complex revealed by variable temperature Raman spectroscopy and single crystal X-ray diffraction? Max Attwood,Hiroki Akutsu,Lee Martin,Toby J. Blundell,Pierre Le Maguere,Scott S. TurnerDalton Trans., 2021,50, 11843-11851 10.1039/D1DT01743H
- [2] Excellent mechanical performance and enhanced dielectric properties of OBC/SiO2 elastomeric nanocomposites: effect of dispersion of the SiO2 nanoparticles? Xing Zhao,Lu Bai,Rui-Ying Bao,Zheng-Ying Liu,Ming-Bo Yang,Wei YangRSC Adv., 2017,7, 46297-46305 10.1039/C7RA08074C
- [3] Evidence of CO2 molecule acting as an electron acceptor on a nanoporous metal–organic-framework MIL-53 or Cr3+(OH)(O2C–C6H4–CO2)? Alexandre Vimont,Arnaud Travert,Philippe Bazin,Jean-Claude Lavalley,Marco Daturi,Christian Serre,Gérard Férey,Sandrine Bourrelly,Philip L. LlewellynChem. Commun., 2007, 3291-3293 10.1039/B703468G
- [4] Dissociative dynamics of O2 on Ag(110)? Ivor Lon?ari?Phys. Chem. Chem. Phys., 2015,17, 9436-9445 10.1039/C4CP05900J
- [5] Embedding cyclic nitrone in mesoporous silica particles for EPR spin trapping of superoxide and other radicals? Eric Besson,Stéphane Gastaldi,Emily Bloch,Selma Aslan,Hakim Karoui,Olivier Ouari,Micael HardyAnalyst, 2019,144, 4194-4203 10.1039/C9AN00468H
- [6] Enabling shape memory and healable effects in a conjugated polymer by incorporating siloxane via dynamic imine bond? Yaling Zhang,Chunhui Dai,Shiwei Zhou,Bin LiuChem. Commun., 2018,54, 10092-10095 10.1039/C8CC05410J
- [7] Excellent lithium ion storage property of porous MnCo2O4 nanorods? Peiyuan Zeng,Xiaoxiao Wang,Ming Ye,Qiuyang Ma,Jianwen Li,Wanwan Wang,Baoyou Geng,Zhen FangRSC Adv., 2016,6, 23074-23084 10.1039/C5RA26176G
- [8] Fate of Sb(v) and Sb(iii) species along a gradient of pH and oxygen concentration in the Carnoulès mine waters (Southern France) Eléonore Resongles,Corinne Casiot,Fran?oise Elbaz-Poulichet,Rémi Freydier,Odile Bruneel,Christine Piot,Sophie Delpoux,Aurélie Volant,Angélique DesoeuvreEnviron. Sci.: Processes Impacts, 2013,15, 1536-1544 10.1039/C3EM00215B
- [9] Excitation dependent bidirectional electron transfer in phthalocyanine-functionalised MoS2 nanosheets? Christopher J. Harrison,Kyle J. Berean,Enrico Della Gaspera,Jian Zhen Ou,Richard B. Kaner,Kourosh Kalantar-zadeh,Torben DaenekeNanoscale, 2016,8, 16276-16283 10.1039/C6NR04326G
- [10] Estimates of hydride ion stability in condensed systems: energy of formation and solvation in aqueous and polar-organic solvents Craig A. Kelly,David R. RosseinskyPhys. Chem. Chem. Phys., 2001,3, 2086-2090 10.1039/B010092G
Journal Name：RSC Advances
research_products
-
CAS no.: 89640-58-4
![N-(3-cyanothiolan-3-yl)-2-[(2,2,2-trifluoroethyl)sulfanyl]pyridine-4-carboxamide](https://ossimg.kuujia.com/scimg/1444500/1444113-98-7x500.png)
![1,2,3,4,5,6-Hexahydro-[2,3]bipyridinyl-6-ol](https://ossimg.kuujia.com/scimg/1271000/1270529-38-8x500.png)
![2,2-Difluoro-3-[methyl(2-methylbutyl)amino]propanoic acid](https://ossimg.kuujia.com/scimg/2138500/2138166-62-6x500.png)
![2-(1H-indol-3-yl)-N-{[6-(thiophen-2-yl)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl]methyl}acetamide](https://ossimg.kuujia.com/scimg/2034500/2034271-14-0x500.png)