Three-Dimensional Structural Diversity-Oriented Peptidomimetics Based on the Cyclopropylic Strain
摘要:
Conformationally restricted peptidomimetics comprising eight stereoisomeric scaffolds with three-dimensional structural diversity were designed based on the structural features of cyclopropane, that is, cyclopropylic strain, which mimic wide-ranging tetrapeptide conformations covering beta-turns through beta-strands. Stereoselective synthesis of the designed peptidomimetics led to the identification of nonpeptidic melanocortin-4 receptor ligands.
medicinal chemical importance using Pd(II)-catalyzed arylation via directing group-mediated C(sp3)-Hactivation. The key aspect for the effective arylation was control of the substrate conformation based on the characteristic steric and stereoelectronic features of cyclopropane by manipulating the protecting group at the hydroxyl. The arylation with good functional group tolerance is pivotal as the first
We have developed a one-potring-closingmetathesis (RCM)/oxidation methodology to yield various 2-quinolines from 2-vinyl-N-allylaniline derivatives. This is a first example of an oxidation involving methylene (CH2) groups with modified Grubbs-type ruthenium complexes. Hence, this adds an example of a non-methathesis reaction using a ruthenium carbene catalyst.
three-dimensional diversity-oriented conformational restriction strategy using key chiral cyclopropane units, we previously identified 3 ((2S,3R)-4-amino-3,4-methanobutyric acid) with a chiral trans-cyclopropane structure as a gamma-aminobutyric acid (GABA) transporter inhibitor selective for GABA transporter (GAT) subtypes GAT-3 and BGT-1 (betaine/GABA transporter-1). Further conformational restriction of 3 with
Cascade Cope/Winstein Rearrangements: Synthesis of Azido-Cycloheptadienes from Dialkenylcyclopropanes Possessing a Vinyl Azide
作者:Thomas Abegg、Janine Cossy、Christophe Meyer
DOI:10.1021/acs.orglett.2c01888
日期:2022.7.15
2-Dialkenylcyclopropanes incorporating a vinyl azide, generated by Knoevenagel condensations between the corresponding cyclopropanecarbaldehydes and α-azido ketones, undergo cascade Cope and Winstein [3,3]-sigmatropic rearrangements, under mild conditions. The sequence allows access to diversely substituted 1,4-cycloheptadienes armed with a secondary allylic azide with up to three stereocenters.
Ligand-Free Suzuki–Miyaura Coupling with Sulfur-Modified Gold-Supported Palladium in the Synthesis of a Conformationally-Restricted Cyclopropane Compound Library with Three-Dimensional Diversity
A conformationally restricted privileged structure library with stereochemical diversity for a "fragment growth" methodology comprising 90 compounds was designed and systematically and efficiently synthesized using sulfur-modified Au-supported Pd (SAPd)-catalyzed ligand-free Suzuki-Miyaura coupling of vinyl iodide promoted by microwave and subsequent amidation in liquid-phase combinatorial chemistry as key reactions. Evaluation of the compounds with a 20-kinase panel indicated the usefulness of this "fragment growth" methodology for finding hit library compounds for fragment-based drug discovery.