Chiral Analogues of PFI-1 as BET Inhibitors and Their Functional Role in Myeloid Malignancies
摘要:
Structural analogues of PFI-1 varying at the sulfur core were prepared, and their activities as BET inhibitors in myeloid cell lines and primary cells from patients with acute myeloid leukemia were studied. Docking calculations followed by molecular dynamics simulations revealed the binding mode of the newly prepared inhibitors, suggesting explanations for the observed high enantiospecificity of the inhibitory activity.
C<sub>1</sub>-Symmetric Aminosulfoximines as Ligands in Copper-Catalyzed Carbonyl-Ene Reactions
作者:Carsten Bolm、Martin Langner、Pauline Rémy
DOI:10.1055/s-2005-863737
日期:——
Highly modular C 1 -symmetric aminosulfoximines were prepared and applied as chiral ligands in copper-catalyzed enantioselective carbonyl-ene reactions. The optimized system catalyzed the conversion of pyruvates and 1,1-disubstituted olefins yielding the corresponding hydroxy esters with high enantiomeric excesses (up to 91% ee) in moderate yields.
高度模块化的 C 1 -对称氨基亚砜亚胺被制备并用作铜催化的对映选择性羰基-烯反应中的手性配体。优化的系统催化丙酮酸和 1,1-二取代烯烃的转化,以中等产率产生具有高对映体过量(高达 91% ee)的相应羟基酯。
<i>C</i><sub>2</sub>-Symmetric Bissulfoximines as Ligands in Copper-Catalyzed Enantioselective Diels−Alder Reactions
[reaction: see text] Bissulfoximines have been used as chiral ligands in copper-catalyzedenantioselective Diels-Alder reactions between acryloyl-2-oxazolidinones and cyclopentadiene. After optimizing the ligand structure, the metal source, the counterions, and the solvent, products with up to 93% ee have been obtained.
A Mild Synthetic Procedure for the Preparation of N-Alkylated Sulfoximines
作者:Carsten Bolm、Christian P. R. Hackenberger、Oliver Simić、Marinella Verrucci、Dirk Müller、Frank Bienewald
DOI:10.1055/s-2002-28514
日期:——
N-Alkylated sulfoximines have been synthesized in good yields by acylation of NH-sulfoximines followed by carbonyl reduction with complexed boranes. Enantiopure substrates react without racemization, and stereogenic centers originating from the acylating component are retained. If the acylation is performed by DCC coupling, this two-step procedure represents a rare example of a formal N-alkylation of sulfoximines under base-free conditions.
C2-Symmetric Bissulfoximines in Palladium-catalyzed Allylic Alkylations
作者:Carsten Bolm、Oliver Simić、Marc Martin
DOI:10.1055/s-2001-18756
日期:——
C2-Symmetric bissulfoximines 2 have been used as chiral ligands in palladium-catalyzed asymmetric allylic alkylations. With 2c enantioselectivities of up to 98% ee have been achieved in the reaction of 1,3-diphenylpropenyl acetate with malonates as nucleophiles.
Sulfoximine--Titanium Reagents in Enantioselective Trimethylsilylcyanations of Aldehydes.
作者:Carsten Bolm、Peter Müller、Klaus Harms、Kim Simonsen、György Liptay、Katrin Trautwein-Fritz、Joseph Stackhouse、Mauro I. Ciglic、Monika Haugg、Nathalie Trabesinger-Rüf、Elmar G. Weinhold
DOI:10.3891/acta.chem.scand.50-0305
日期:——
Chiral titanium reagents derived from optically active sulfoximines and Ti(O-i-Pr)(4) promote the asymmetric addition of trimethysilyl cyanide to aldehydes affording cyanohydrins in high yields with good enantioselectivities (up to 91% ee). The ligand structure and the reaction conditions have been optimized. With substoichiometric amounts of the sulfoximine-titanium reagent the product is obtained in decreased yield with lower enantiomeric excess. The molecular structures of (R)-S-(2-hydroxyphenyl)-S-methyl sulfoximine [(R)-4a] and (R)-S-(2-hydroxyphenyl)-S-(1,1-dimethylethyl) sulfoximine [(R)-4d] have been determined by X-ray diffraction analysis.