1
|
Nemat SJ, Tiefenbacher K. Thioderivatives of Resorcin[4]arene and Pyrogallol[4]arene: Are Thiols Tolerated in the Self-Assembly Process? Org Lett 2021; 23:6861-6865. [PMID: 34432471 DOI: 10.1021/acs.orglett.1c02426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Three novel thiol bearing resorcin[4]arene and pyrogallol[4]arene derivatives were synthesized. Their properties were studied with regards to self-assembly, disulfide chemistry, and Brønsted acid catalysis. This work demonstrates that (1) one aromatic thiol on the resorcin[4]arene framework is tolerated in the self-assembly process to a hexameric hydrogen bond-based capsule, (2) thio-derivatized resorcin[4]arene analogs can be covalently linked through disulfides, and (3) the increased acidity of aromatic thio-substituent is not sufficient to replace HCl as cocatalyst for capsule catalyzed terpene cyclizations.
Collapse
Affiliation(s)
- Suren J Nemat
- Department of Chemistry, University of Basel, Mattenstrasse 24a, 4058 Basel, Switzerland.,National Centre of Competence in Research (NCCR) Molecular Systems Engineering, BPR 1095, Basel, Switzerland
| | - Konrad Tiefenbacher
- Department of Chemistry, University of Basel, Mattenstrasse 24a, 4058 Basel, Switzerland.,National Centre of Competence in Research (NCCR) Molecular Systems Engineering, BPR 1095, Basel, Switzerland.,Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 24, 4058 Basel, Switzerland
| |
Collapse
|
2
|
Saint-Denis TG, Lam NYS, Chekshin N, Richardson PF, Chen JS, Elleraas J, Hesp KD, Schmitt DC, Lian Y, Huh CW, Yu JQ. Mechanistic study of enantioselective Pd-catalyzed C(sp 3)-H activation of thioethers involving two distinct stereomodels. ACS Catal 2021; 11:9738-9753. [PMID: 35572380 DOI: 10.1021/acscatal.1c02808] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Enantioselective C(sp3)-H activation has gained considerable attention from the synthetic chemistry community. Despite the intense interest in these reactions, the mechanisms responsible for enantioselection are still vague. In the course of the development of aryl thioether-directed C(sp3)-H arylation, we noticed extreme variation in sensitivity of two substrate classes to substituent effects of ligands and directing groups: whereas 3-pentyl sulfides (prochiral α-center) responded positively to substitution on ligands and directing groups, isobutyl sulfides (prochiral β-center) were entirely insensitive. Quantitative structure selectivity relationship (QSSR) analyses of directing group and ligand substitution and the development of a new class of mono-N-acetyl protected amino anilamide (MPAAn) ligands led to high enantiomeric ratios (up to 99:1) for thioether-directed C(sp3)-H arylation. Key to the realization of this method was the exploitation of transient chirality at sulfur, which relays stereochemical information from the ligand backbone to enantiotopic carbons of the substrate in a rate- and enantio-determining cyclometallation deprotonation. The absolute stereochemistry of the products for these two substrates were revealed to be opposite. DFT evaluation of all possible diastereomeric transition states confirmed initial premises that guided rational ligand and directing group design. The implications of this study will assist in the further development of enantioselective C(sp3)-H activation, namely by highlighting the non-innocence of directing groups, distal steric influences, and the delicate interplay between steric Pauli repulsion and London dispersion in enantioinduction.
Collapse
Affiliation(s)
| | - Nelson Y S Lam
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037
| | - Nikita Chekshin
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037
| | - Paul F Richardson
- Oncology Medicinal Chemistry, Pfizer Global Research and Development, San Diego, CA 92121
| | - Jason S Chen
- Automated Synthesis Facility, The Scripps Research Institute, La Jolla, CA 92037
| | - Jeff Elleraas
- Oncology Medicinal Chemistry, Pfizer Global Research and Development, San Diego, CA 92121
| | - Kevin D Hesp
- Medicine Design, Pfizer Global Research and Development, Groton, CT 06340
| | - Daniel C Schmitt
- Medicine Design, Pfizer Global Research and Development, Groton, CT 06340
| | - Yajing Lian
- Medicine Design, Pfizer Global Research and Development, Groton, CT 06340
| | - Chan Woo Huh
- Medicine Design, Pfizer Global Research and Development, Groton, CT 06340
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037
| |
Collapse
|
3
|
Kortus D, Křížová K, Dvořáková H, Eigner V, Lhoták P. Synthesis of 2,8-dithiacalix[4]arene based on fragment condensation. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152924] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
4
|
Ngodwana L, Bose S, Smith VJ, van Otterlo WAL, Arnott GE. A Bidentate Resorcinarene‐Based Palladium Carbene Complex. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lonwabo Ngodwana
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1, Matieland 7602 Stellenbosch South Africa
| | - Sritama Bose
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1, Matieland 7602 Stellenbosch South Africa
| | - Vincent J. Smith
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1, Matieland 7602 Stellenbosch South Africa
| | - Willem A. L. van Otterlo
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1, Matieland 7602 Stellenbosch South Africa
| | - Gareth E. Arnott
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1, Matieland 7602 Stellenbosch South Africa
| |
Collapse
|
5
|
Ahn S, Park TJ, Choe JI. mPW1PW91 Calculated Structures and IR Spectra of the Conformational Stereoisomers of C-Cyanophenyl Pyrogallol[4]arene. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.5.1323] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
6
|
Gramage-Doria R, Armspach D, Matt D. Metallated cavitands (calixarenes, resorcinarenes, cyclodextrins) with internal coordination sites. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.10.006] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
7
|
Ngodwana L, Kleinhans DJ, Smuts AJ, van Otterlo WAL, Arnott GE. Selective derivatisation of resorcinarene ethers via an ortholithiation approach. RSC Adv 2013. [DOI: 10.1039/c3ra00141e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|