17445-33-9

Upstream product

• 55739-16-7 Z-L-Val-L-Ala-OEt 
• 56-41-7 L-alanin 
• 1149-26-4 (S)-N-(benzyloxycarbonyl)valine 
• 22221-83-6 benzyloxycarbonyl-L-valyl-L-alanine methyl ester 
• 13404-22-3 tert-butyl L-alaninate hydrochloride 

Downstream Products

• 1115-74-8 Val-Ala 
• 161401-75-8 (S)-3-[(S)-2-((S)-2-Benzyloxycarbonylamino-3-methyl-butyrylamino)-propionylamino]-3-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-propionic acid ethyl ester 
• 161401-80-5 3-[(S)-2-((S)-2-Benzyloxycarbonylamino-3-methyl-butyrylamino)-propionylamino]-5-fluoro-4-hydroxy-pentanoic acid tert-butyl ester 
• 55739-16-7 Z-L-Val-L-Ala-OEt 
• 1361144-02-6 C₁₆H₂₂N₂O₄S 
• 16816-23-2 N-(benzyloxycarbonyl)-L-leucyl-L-valcyl-L-alanine methyl ester 
• 15136-26-2 (3S,6S)-3-methyl-6-(1-methylethyl)piperazine-2,5-dione 
• 161401-77-0 2,6-Dichloro-benzoic acid (2R,3S)-3-[(S)-2-((S)-2-benzyloxycarbonylamino-3-methyl-butyrylamino)-propionylamino]-4-ethoxycarbonyl-2-hydroxy-butyl ester 
• 161401-76-9 (3S,4R)-3-[(S)-2-((S)-2-Benzyloxycarbonylamino-3-methyl-butyrylamino)-propionylamino]-4,5-dihydroxy-pentanoic acid ethyl ester 

Relevant academic research and scientific papers

Optimization and anti-cancer properties of fluoromethylketones as covalent inhibitors for ubiquitin C-terminal hydrolase L1

The deubiquitinating enzyme (DUB) UCHL1 is implicated in various disease states including neurodegenerative disease and cancer. However, there is a lack of quality probe molecules to gain a better understanding on UCHL1 biology. To this end a study was carried out to fully characterize and optimize the irreversible covalent UCHL1 inhibitor VAEFMK. Structure-activity relationship studies identified modifications to improve activity versus the target and a full cellular characterization was carried out for the first time with this scaffold. The studies produced a new inhibitor, 34, with an IC50 value of 7.7 μM against UCHL1 and no observable activity versus the closest related DUB UCHL3. The molecule was also capable of selectively inhibiting UCHL1 in cells and did not demonstrate any discernible off-target toxicity. Finally, the molecule was used for initial probe studies to assess the role of UCHL1 role in proliferation of myeloma cells and migration behavior in small cell lung cancer cells making 34 a new tool to be used in the biological evaluation of UCHL1.

ANTIBODY DRUG CONJUGATES (ADCS) AND ANTIBODY PRODRUG CONJUGATES (APDCS) WITH ENZYMATICALLY CLEAVABLE GROUPS

The present invention relates to novel binder-prodrug conjugates (APDCs) where binders are conjugated with inactive precursor compounds of kinesin spindle protein inhibitors, and to antibody-drug conjugates ADCs and to processes for producing these APDCs and ADCs.

Carboxylate isosteres for caspase inhibitors: The acylsulfonamide case revisited

As part of an ongoing effort to discover inhibitors of caspase-1 with an optimized selectivity and biopharmaceutical profile, acylsulfonamides were explored as carboxylate isosteres for caspase inhibitors. Acylsulfonamide analogues of the clinically investigated caspase-1 inhibitor VRT-043198 and of the pan-caspase inhibitor Z-VAD-CHO were synthesized. The isostere-containing analogues with an aldehyde warhead had inhibitory potencies comparable to the carboxylate references. In addition, the conformational and tautomeric characteristics of these molecules were determined using 1H- and 13C-based NMR. The propensity of acylsulfonamides with an aldehyde warhead to occur in a ring-closed conformation at physiological pH significantly increases the sensitivity to hydrolysis of the acylsulfonamide moiety, yielding the parent carboxylate containing inhibitors. These results indicate that the acylsulfonamide analogues of the aldehyde-based inhibitor VRT-043198 might have potential as a novel type of prodrug for the latter. Finally, inhibition of caspase 1 and 11 mediated inflammation in mouse macrophages was found to correlate with the potencies of the compounds in enzymatic assays.

Recyclable hypervalent iodine(III) reagent iodosodilactone as an efficient coupling reagent for direct esterification, amidation, and peptide coupling

A hypervalent iodine(III) reagent plays a novel role as an efficient coupling reagent to promote the direct condensation between carboxylic acids and alcohols or amines to provide esters, macrocyclic lactones, amides, as well as peptides without racemization. The regeneration of iodosodilactone (1) can also be readily achieved. The intermediate acyloxyphosphonium ion C from the activation of a carboxylic acid is thought to be involved in the present esterification reaction.

Soluble alpha-amino acid salts in acetonitrile: practical technology for the production of some dipeptides.

Alpha-amino acids are soluble in acetonitrile when treated with phosphazene bases. As a result, the protection/deprotection events that are usually required for peptide coupling reactions can be minimized. This is illustrated in the synthesis of the important angiotensin-converting enzyme (ACE) inhibitor enalapril. [reaction: see text]