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Water-mediated deracemization of a bisporphyrin helicate assisted by diastereoselective encapsulation of chiral guests

Journal Article · · Nature Communications

Deracemization is a powerful method by which a racemic mixture can be transformed into an excess of one enantiomer with the aid of chiral auxiliaries, but has been applied only to small chiral molecular systems. Here we report a deracemization of a racemic double-stranded spiroborate helicate containing a bisporphyrin unit upon encapsulation of chiral aromatic guests between the bisporphyrin. The chiral guest-included helicate is kinetically stable, existing as a mixture of right- and left-handed double helices, which eventually undergo an inversion of the helicity triggered by water resulting from the water-mediated reversible diastereoselective B-O bond cleavage/reformation of the spiroborate groups, thus producing an optically-active helicate with a high enantioselectivity. Quantum chemical calculations suggest that the stereospecific CH-π interactions between the porphyrin hydrogen atoms of the helicate and an aromatic pendant group of the chiral guest play a key role in the enhancement of the helical handedness of the helicate.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; Japan Society for the Promotion of Science (JSPS)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1659567
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (73)

Non-Sequential Processes for the Transformation of a Racemate into a Single Stereoisomeric Product: Proposal for Stereochemical Classification journal December 2001
Consequences of Cooperativity in Racemizing Supramolecular Systems journal May 2012
Enantioselective Synthesis of Copper(I) Bipyridine Based Helicates by Chiral Templating of Secondary Structure: Transmission of Stereochemistry on the Nanometer Scale journal September 1996
Quantification of a CH-π Interaction Responsible for Chiral Discrimination and Evaluation of Its Contribution to Enantioselectivity journal October 2009
Aromatic Rings in Chemical and Biological Recognition: Energetics and Structures journal April 2011
Boronic Acids in Molecular Self‐Assembly journal July 2008
Über Spiegelbild-Isomerie bei Chromverbindungen. III journal October 1912
A Highly Fluorescent Metallosalalen-Based Chiral Cage for Enantioselective Recognition and Sensing journal April 2014
New Chiral Anion Mediated Asymmetric Chemistry journal April 2005
From a Racemate to a Single Enantiomer: Deracemization by Stereoinversion journal January 2007
Trinuclear Double Helicates of Iron(II) and Nickel(II): Self-assembly and resolution into helical enantiomers journal September 1996
The CH/π interaction: Significance in molecular recognition journal August 1995
Porphyrin tweezer receptors: Binding studies, conformational properties and applications journal January 2014
Designing Helical Molecular Capsules Based on Folded Aromatic Amide Oligomers journal March 2018
Supramolecular Helical Systems: Helical Assemblies of Small Molecules, Foldamers, and Polymers with Chiral Amplification and Their Functions journal October 2016
“Let's Twist Again”Double-Stranded, Triple-Stranded, and Circular Helicates journal November 2001
Helicates as Versatile Supramolecular Complexes journal October 1997
A macromolecular conformational change driven by a minute chiral solvation energy journal June 1993
Asymmetric syntheses, asymmetric transformations, and asymmetric inductions in an optically active solvent journal November 1967
Enantioselective Guest Binding and Dynamic Resolution of Cationic Ruthenium Complexes by a Chiral Metal−Ligand Assembly journal March 2004
Oligoresorcinols Fold into Double Helices in Water journal June 2006
A Chiral Quadruple-Stranded Helicate Cage for Enantioselective Recognition and Separation journal April 2012
Assembly of Surface-Confined Homochiral Helicates: Chiral Discrimination of DOPA and Unidirectional Charge Transfer journal October 2013
Thermodynamic Evaluation of Aromatic CH/π Interactions and Rotational Entropy in a Molecular Rotor journal February 2015
Guest-Encapsulation Properties of a Self-Assembled Capsule by Dynamic Boronic Ester Bonds journal January 2010
Chiral Recognition Properties in Complexation of Two Asymmetric Hemicarcerands 1 journal December 1997
Chiral Microenvironments in Self-Assembled Capsules journal November 1999
Spiroborate-Based Double-Stranded Helicates: Meso -to- Racemo Isomerization and Ion-Triggered Springlike Motion of the Racemo -Helicate journal November 2018
Interconversion of single and double helices formed from synthetic molecular strands journal October 2000
DNA-like double helix formed by peptide nucleic acid journal April 1994
Mechanical twisting of a guest by a photoresponsive host journal March 2006
Dynamic control of chirality and self-assembly of double-stranded helicates with light journal November 2016
Ion-triggered spring-like motion of a double helicate accompanied by anisotropic twisting journal May 2010
Optically active single-walled carbon nanotubes journal May 2007
Metalloporphyrin hosts for supramolecular chemistry of fullerenes journal January 2007
Recent advances in enzymatic and chemical deracemisation of racemic compounds journal January 2013
Quantitative model for rationalizing solvent effect in noncovalent CH–Aryl interactions journal January 2016
Deracemisations under kinetic and thermodynamic control journal January 2017
Spontaneous assembly of double-stranded helicates from oligobipyridine ligands and copper(I) cations: structure of an inorganic double helix. journal May 1987
Non-covalent Interactions in Metal Complexes. II. Induction of Asymmetry in Cobalt(III) Complexes with Amino Acid–Schiff Bases. Importance of CH···π-Interaction in Determining Configuration of Complexes journal August 1980
Host-guest Studies of Bis-porphyrins journal April 2012
Supramolecular Chirality in Porphyrin Chemistry journal April 2014
Non-Sequential Processes for the Transformation of a Racemate into a Single Stereoisomeric Product: Proposal for Stereochemical Classification journal December 2001
From a Racemate to a Single Enantiomer: Deracemization by Stereoinversion journal September 2006
A Modular Strategy to Artificial Double Helices journal June 2005
Quantification of a CH-π Interaction Responsible for Chiral Discrimination and Evaluation of Its Contribution to Enantioselectivity journal October 2009
Guest-Induced Unidirectional Dual Rotary and Twisting Motions of a Spiroborate-Based Double-Stranded Helicate Containing a Bisporphyrin Unit journal May 2013
A Modular Strategy to Artificial Double Helices journal June 2005
Consequences of Cooperativity in Racemizing Supramolecular Systems journal May 2012
Guest-Induced Unidirectional Dual Rotary and Twisting Motions of a Spiroborate-Based Double-Stranded Helicate Containing a Bisporphyrin Unit journal May 2013
Enantioselective interactions of inversion-labile trigonal iron(II) complexes upon binding to DNA: ENANTIOSELECTIVE DNA BINDING journal July 1986
Über einen neuen Effekt in Lösungen optisch-aktiver Substanzen (I. Mitteil.) journal November 1931
Über einen neuen Effekt in Lösungen optisch-aktiver Substanzen journal January 1932
Metalloporphyrin Hosts for Supramolecular Chemistry of Fullerenes journal May 2007
Spontaneous Deracemization journal July 2011
Optically Active Porphyrin and Phthalocyanine Systems journal May 2016
Asymmetric Transformation of a Double-Stranded, Dicopper(I) Helicate Containing Achiral Bis(bidentate) Schiff Bases journal February 2006
Supramolecular Asymmetric Induction in Dinuclear Triple-Stranded Helicates 1 journal February 2006
Asymmetric Transformation of a Double-Stranded, Dicopper(I) Helicate Containing Achiral Bis(bidentate) Schiff Bases journal October 2006
Extension of chromatographically-derived molecular recognition concepts to first order asymmetric transformations journal November 1987
Allosteric Regulation of Unidirectional Spring-like Motion of Double-Stranded Helicates journal March 2016
Optically pure, water-stable metallo-helical ‘flexicate’ assemblies with antibiotic activity journal November 2011
Metalloporphyrin hosts for supramolecular chemistry of fullerenes journal January 2007
Quantitative model for rationalizing solvent effect in noncovalent CH–Aryl interactions journal January 2016
Deracemisations under kinetic and thermodynamic control journal January 2017
New chiral anion mediated asymmetric chemistry journal January 2005
Supramolecular double helical Cu(i) complexes for asymmetric cyclopropanation journal January 2007
Asymmetric induction of supramolecular helicity in calix[4]arene-based triple-stranded helicate journal January 2009
Probing molecular chirality by CD-sensitive dimeric metalloporphyrin hosts journal January 2009
Chiral porphyrin dimer with a macrocyclic cavity for intercalation of aromatic guests journal January 2011
Synthesis and optical resolution of a Cu(i) double-stranded helicate with ketimine-bridged tris(bipyridine) ligands journal January 2011
Approaches to the synthesis of optically pure helicates journal January 2011
Synthesis, structure and resolution of a dinuclear Co III triple helix journal January 1994

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