197006-05-6

Upstream product

• 109579-08-0 (S)-[1-benzyl-2-(2,2-dimethyl-4,6-dioxo-[1,3]dioxan-5-yl)-2-oxo-ethyl]-carbamic acid tert-butyl ester 
• 63-91-2 L-phenylalanine 
• 13734-34-4 N-tert-butoxycarbonyl-L-phenylalanine 
• 2033-24-1 cycl-isopropylidene malonate 
• 24424-99-5 di-tert-butyl dicarbonate 

Downstream Products

• 128811-42-7 (R)-2-benzyl-5-oxo-pyrrolidine-1-carboxylic acid tert-butyl ester 
• 63328-11-0 (5R)-5-benzylpyrrolidin-2-one 
• 195867-20-0 (4S)-4-[(tert-butoxycarbonyl)amino]-5-phenylpentanoic acid 
• 919518-38-0 methyl (2S,4R)-4-[(tert-butoxycarbonyl)amino]-2-methyl-5-phenylpentanoate 
• 368870-62-6 methyl (4R)-4-[(tert-butoxycarbonyl)amino]-2-methyl-5-phenylpentanoate 
• 228864-44-6 (R)-Benzyl 5-phenyl-4-<(tert-butoxycarbonyl)amino>pentanoate 

Relevant academic research and scientific papers

ATM KINASE INHIBITORS AND COMPOSITIONS AND METHODS OF USE THEREOF

Provided are certain ATM kinase inhibitors of Formula (I). Also provided herein are compositions of such compounds, and methods of their use.

SYNTHESIS AND APPLICATION OF CHIRAL SUBSTITUTED POLYVINYLPYRROLIDINONES

Chiral polyvinylpyrrolidinone (CSPVP), complexes of CSPVP with a core species, such as a metallic nanocluster catalyst, and enantioselective oxidation reactions utilizing such complexes are disclosed. The CSPVP complexes can be used in asymmetric oxidation of diols, enantioselective oxidation of alkenes, and carbon-carbon bond forming reactions, for example. The CSPVP can also be complexed with biomolecules such as proteins, DNA, and RNA, and used as nanocarriers for siRNA or dsRNA delivery.

TUBULYSINS AND PROTEIN-TUBULYSIN CONJUGATES

Provided herein are compounds, compositions, and methods for the treatment of diseases and disorders associated with cancer, including tubulysins and protein (e.g., antibody) drug conjugates thereof.

TUBULYSIN ANALOGUES AS ANTICANCER AGENTS AND PAYLOADS FOR ANTIBODY-DRUG CONJUGATES AND METHODS OF TREATMENT THEREWITH

In one aspect, the present disclosure provides tubulysin analogs of the formula (I) wherein the variables are as defined herein. In another aspect, the present disclosure also provides methods of preparing the compounds disclosed herein. In another aspect

Synthesis, antimycobacterial activity and influence on mycobacterial InhA and PknB of 12-membered cyclodepsipeptides

In recent years, several small natural cyclopeptides and cyclodepsipeptides were reported to have antimycobacterial activity. Following this lead, a synthetic pathway was developed for a small series of 12-membered ring compounds with one amide and two ester bonds (cyclotridepsipeptides). Within the series, the ring system proved to be necessary for growth inhibition of Mycobacterium smegmatis and Mycobacterium tuberculosis in the low micromolar range. Open-chain precursors and analogues were inactive. The compounds modulated autophosphorylation of the mycobacterial protein kinase B (PknB). PknB inhibitors were active at μM concentration against mycobacteria while inducers were inactive. PknB regulates the activity of the mycobacterial reductase InhA, the target of isoniazid. The activity of the series against Mycobacterium bovis BCG InhA overexpressing strains was indistinguishable from that of the parental strain suggesting that they do not inhibit InhA. All substances were not cytotoxic (HeLa > 5 μg/ml) and did not show any significant antiproliferative effect (HUVEC > 5 μg/ml; K-562 > 5 μg/ml). Within the scope of this study, the molecular target of this new type of small cyclodepsipeptide was not identified, but the data suggest interaction with PknB or other kinases may partly cause the activity.

Improved Total Synthesis of Tubulysins and Design, Synthesis, and Biological Evaluation of New Tubulysins with Highly Potent Cytotoxicities against Cancer Cells as Potential Payloads for Antibody-Drug Conjugates

Improved, streamlined total syntheses of natural tubulysins such as V (Tb45) and U (Tb46) and pretubulysin D (PTb-D43), and their application to the synthesis of designed tubulysin analogues (Tb44, PTb-D42, PTb-D47-PTb-D49, and Tb50-Tb120), are described.

Chiral-Substituted Poly-N-vinylpyrrolidinones and Bimetallic Nanoclusters in Catalytic Asymmetric Oxidation Reactions

A new class of poly-N-vinylpyrrolidinones containing an asymmetric center at C5 of the pyrrolidinone ring were synthesized from l-amino acids. The polymers, particularly 17, were used to stabilize nanoclusters such as Pd/Au for the catalytic asymmetric oxidations of 1,3- and 1,2-cycloalkanediols and alkenes, and Cu/Au was used for C-H oxidation of cycloalkanes. It was found that the bulkier the C5 substituent in the pyrrolidinone ring, the greater the optical yields produced. Both oxidative kinetic resolution of (±)-1,3- and 1,2-trans-cycloalkanediols and desymmetrization of meso cis-diols took place with 0.15 mol % Pd/Au (3:1)-17 under oxygen atmosphere in water to give excellent chemical and optical yields of (S)-hydroxy ketones. Various alkenes were oxidized with 0.5 mol % Pd/Au (3:1)-17 under 30 psi of oxygen in water to give the dihydroxylated products in >93% ee. Oxidation of (R)-limonene at 25 °C occurred at the C-1,2-cyclic alkene function yielding (1S,2R,4R)-dihydroxylimonene 49 in 92% yield. Importantly, cycloalkanes were oxidized with 1 mol % Cu/Au (3:1)-17 and 30% H2O2 in acetonitrile to afford chiral ketones in very good to excellent chemical and optical yields. Alkene function was not oxidized under the reaction conditions. Mechanisms were proposed for the oxidation reactions, and observed stereo- and regio-chemistry were summarized.

Synthesis and biological evaluation of pretubulysin and derivatives

Pretubulysin, a biosynthetic precursor of the tubulysins, shows potent biological activity in the subnanomolar range towards various tumor cell lines. Its activity is only slightly less than those of the structurally more complex tubulysins. With a straig

An efficient synthesis of achiral and chiral 1,2,4-triazolium salts: Bench stable precursors for N-heterocyclic carbenes

The promising utility of triazolyl N-heterocyclic carbene catalysts in umpolung aldehyde chemistry requires a straight-forward reliable synthesis from readily available materials. Herein, we describe the synthesis of a variety of triazolyl N-heterocyclic

Facile stereoselective synthesis of γ-substituted γ-amino acids from the corresponding α-amino acids

A facile stereoselective method for the synthesis of γ-substituted, γ-amino acids from α-amino acids was developed. The key step of the procedure is complete reduction of the keto functionality of α-amino acyl Meldrum's acid by sodium acetoxyborohydride. The resulting amino alkyl Meldrum's acid undergoes thermal decarboxylative ring closure to a 5-substituted pyrrolidinone which yields the corresponding γ-amino acid after basic hydrolysis. The overall yield of the procedure ranges from 40 to 65%.