scholarly journals Campestarenes: new building blocks with 5-fold symmetry

2018 ◽  
Vol 16 (35) ◽  
pp. 6460-6469 ◽  
Author(s):  
Seong Nam ◽  
David C. Ware ◽  
Penelope J. Brothers
Keyword(s):  
Functional Groups ◽  
Building Blocks ◽  
Supramolecular Assemblies

New campestarene derivatives bear functional groups designed to facilitate the formation of supramolecular assemblies of these 5-fold symmetric building blocks.

A Practical and General Approach to the Late-Stage Functionalization of Complex Sulfonamides

2019 ◽  
Author(s):  
Patrick Fier ◽  
Kevin M. Maloney
Keyword(s):  
Functional Groups ◽  
Late Stage ◽  
Building Blocks ◽  
Pharmaceutical Compounds ◽  
Stage Conversion

Herein we describe the development and application of a method for the mild, late-stage conversion of primary sulfonamides to several other other functional groups. These reactions occur via initial reductive deamination of sulfonamides to sulfinates via an NHC-catalyzed reaction of transiently formed <i>N</i>-sulfonylimines. The method described here is tolerant of nearly all common functional groups, as exemplified by the late-stage derivatization of several complex pharmaceutical compounds. Based on the prevalence of sulfonamide-containing drugs and building blocks, we have developed a method to enable sulfonamides to be applied as versatile synthetic handles for synthetic chemsitry.

A Practical and General Approach to the Late-Stage Functionalization of Complex Sulfonamides

2019 ◽  
Author(s):  
Patrick Fier ◽  
Kevin M. Maloney
Keyword(s):  
Functional Groups ◽  
Late Stage ◽  
Building Blocks ◽  
Pharmaceutical Compounds ◽  
Stage Conversion

Herein we describe the development and application of a method for the mild, late-stage conversion of primary sulfonamides to several other other functional groups. These reactions occur via initial reductive deamination of sulfonamides to sulfinates via an NHC-catalyzed reaction of transiently formed <i>N</i>-sulfonylimines. The method described here is tolerant of nearly all common functional groups, as exemplified by the late-stage derivatization of several complex pharmaceutical compounds. Based on the prevalence of sulfonamide-containing drugs and building blocks, we have developed a method to enable sulfonamides to be applied as versatile synthetic handles for synthetic chemsitry.

scholarly journals Non-Enzymatic Desymmetrization Reactions in Aqueous Media

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 720
Author(s):  
Satomi Niwayama
Keyword(s):  
Natural Products ◽  
Total Synthesis ◽  
Functional Groups ◽  
Organic Compounds ◽  
Recent Progress ◽  
Aqueous Media ◽  
Building Blocks ◽  
Organic Reactions ◽  
Environmentally Benign ◽  
Enzymatic Desymmetrization

Symmetric organic compounds are generally obtained inexpensively, and therefore they can be attractive building blocks for the total synthesis of various pharmaceuticals and natural products. The drawback is that discriminating the identical functional groups in the symmetric compounds is difficult. Water is the most environmentally benign and inexpensive solvent. However, successful organic reactions in water are rather limited due to the hydrophobicity of organic compounds in general. Therefore, desymmetrization reactions in aqueous media are expected to offer versatile strategies for the synthesis of a variety of significant organic compounds. This review focuses on the recent progress of desymmetrization reactions of symmetric organic compounds in aqueous media without utilizing enzymes.

2,2':6',2''-Terpyridine metal complexes as building blocks for extended functional metallo-supramolecular assemblies and polymers

2001 ◽  
Vol 121 (1-3) ◽  
pp. 1249-1252 ◽  
Author(s):  
U.S. Schubert ◽  
C. Eschbaumer ◽  
P. Andres ◽  
H. Hofmeier ◽  
C.H. Weidl ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Building Blocks ◽  
Supramolecular Assemblies

Novel water soluble cationic Au(I) complexes with cyclic PNNP ligand as building blocks for heterometallic supramolecular assemblies with anionic hexarhenium cluster units

2018 ◽  
Vol 196 ◽  
pp. 485-491 ◽  
Author(s):  
Julia Elistratova ◽  
Igor Strelnik ◽  
Konstantin Brylev ◽  
Michael A. Shestopalov ◽  
Tatiana Gerasimova ◽  
...  
Keyword(s):  
Building Blocks ◽  
Supramolecular Assemblies ◽  
Water Soluble

scholarly journals Supramolecular assemblies of organo-functionalised hybrid polyoxometalates: from functional building blocks to hierarchical nanomaterials

2022 ◽  
Author(s):  
Jamie M. Cameron ◽  
Geoffroy Guillemot ◽  
Theodor Galambos ◽  
Sharad S. Amin ◽  
Elizabeth Hampson ◽  
...  
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Supramolecular Assemblies ◽  
The Self ◽  
Supramolecular Materials ◽  
Inorganic Hybrid ◽  
Hierarchical Nanomaterials

Organic–inorganic hybrid polyoxometalates are versatile building blocks for the self-assembly of functional supramolecular materials.

Cation Modules as Building Blocks Forming Supramolecular Assemblies with Planar Receptor–Anion Complexes

2013 ◽  
Vol 135 (4) ◽  
pp. 1284-1287 ◽  
Author(s):  
Bin Dong ◽  
Tsuneaki Sakurai ◽  
Yoshihito Honsho ◽  
Shu Seki ◽  
Hiromitsu Maeda
Keyword(s):  
Building Blocks ◽  
Supramolecular Assemblies ◽  
Anion Complexes

scholarly journals Self assembled nanocages from DNA–protoporphyrin hybrid molecules

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89025-89029 ◽  
Author(s):  
Vandana Singh ◽  
Mohan Monisha ◽  
Roy Anindya ◽  
Prolay Das
Keyword(s):  
Functional Groups ◽  
Protoporphyrin Ix ◽  
Building Blocks ◽  
Carboxyl Groups ◽  
Dna Oligomers ◽  
Organic Hybrid ◽  
Molecular Building Blocks ◽  
Modified Dna ◽  
Hybrid Molecules ◽  
Self Assembled

DNA–organic hybrid molecular building blocks are generated by covalent conjugation of the carboxyl groups of protoporphyrin IX with the amine functional groups of modified DNA oligomers.

A Chiral Interlocking Auxiliary Strategy for the Synthesis of Mechanically Planar Chiral Rotaxanes

2021 ◽  
Author(s):  
Alberto de Juan ◽  
David Lozano ◽  
Andrew Heard ◽  
Michael Jinks ◽  
Jorge Meijide Suarez ◽  
...  
Keyword(s):  
Functional Groups ◽  
Direct Synthesis ◽  
Building Blocks ◽  
Bond Forming ◽  
Single Target

We have serendipitously discovered a combination of reaction partners that function as a “chiral interlocking auxiliary” to both orientate a macrocycle and, effectively, load it onto a new axle. We demonstrate the potential of this finding through the synthesis of a number of targets in high enantiopurity, without separation of stereoisomers, including examples whose axles lack any functional groups that would allow their direct synthesis by other means, so called “impossible” rotaxanes. Intriguingly, by varying the order of bond forming steps, we can effectively choose which end of an axle the macrocycle is loaded onto, allowing the synthesis of both hands of a single target using the same reactions and building blocks.

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