154561-22-5

Basic information

• Product Name: Z-Aib-OBt
• Synonyms: Z-Aib-OBt
• CAS NO: 154561-22-5
• Molecular Weight: 354.365
• Mol File: 154561-22-5.mol
• Article Data: 8

Chemical Properties

• CAS DataBase Reference: Z-Aib-OBt(CAS DataBase Reference)
• NIST Chemistry Reference: Z-Aib-OBt(154561-22-5)
• EPA Substance Registry System: Z-Aib-OBt(154561-22-5)

Safety Data

• Hazardous Substances Data: 154561-22-5(Hazardous Substances Data)

Upstream product

• 15030-72-5 Z-Aib-OH 
• 94790-37-1 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 
• 94790-37-1 O-(benzotriazol-1-yl)-N,N,N,N-tetramethyluroniumhexafluorophosphate 
• 13139-17-8 N-(Benzyloxycarbonyloxy)succinimide 
• 2592-95-2 benzotriazol-1-ol 
• 21978-63-2 1H-benzo[d][1,2,3]triazol-1-yl 4-methanebenzenesulfonate 
• 54769-59-4 N-hydroxybenzotriazole ester of benzenesulfonic acid 
• 54769-22-1 1-methanesulfonyloxy-1,2,3-benzotriazole 
• 54769-58-3 1H-benzo[d][1,2,3]triazol-1-yl 4-nitrobenzenesulfonate 
• 654675-87-3 1-[di(o-tolyl)phosphinyloxy]benzotriazole 

Downstream Products

• 79775-03-4 2-<2-(Benzyloxycarboxamido)-2-methylpropionamido>-2-methylpropionsaeure 
• 4576-16-3 2-(1'-((benzyloxycarbonyl)amino)-1'-methylethyl)-4,4-dimethyloxazolone 
• 4512-38-3 Z-(Aib)4-OtBu 
• 4512-42-9 N-[benzyloxycarbonyl]-2-methylalanyl-2-methylalanyl-2-methylalanyl-2-methylalanine 
• 4512-34-9 benzyl N-[8-(4,4-dimethyl-5-oxo-4,5-dihydrooxazol-2-yl)-2,5,5,8-tetramethyl-3,6-dioxo-4,7-diazanon-2-yl]carbamate 
• 83537-94-4 Benzyloxycarbonyl-α-aminoisobutyryl-α-aminoisobutyric acid tert butyl ester 

Relevant articles and documents

Fluorous 2-chloropyridinium salt (Mukaiyama condensation reagent) for amide formation reactions

A new fluorous 2-chloropyridinium hexafluorophosphate was prepared as a modified Mukaiyama condensation reagent, and it was applied in amide formation reactions. Good to excellent purities of amides were obtained after fluorous solid-phase extraction of reaction mixtures without additional chromatography.

A novel family of onium salts based upon isonitroso meldrum's acid proves useful as peptide coupling reagents

A new family of uronium salts (HTMU, HMMU, and HDmPyMU) based on isonitroso Meldrum's acid (HONM) are reported as stand-alone coupling reagents. Amide bond formation with the use of these reagents occurred more quickly than that with other uronium salts as a result of the presence of a neighboring group effect with a cyclic structure. Thus, these novel onium salts were often more effective in the acylation of poor nucleophiles and in the control of optical purity than related Oxyma- and benzotriazole-based reagents. Among the HONM derivatives, HMMU showed the best performance in reducing racemization and assembling demanding sequences such as the Aib-ACP decapeptide or analogues of Leu-enkephalin pentapeptide, Furthermore, the scope and limitations of the use of HONM as an additive in combination with carbodiimides is discussed.

3-Hydroxy-4-oxo-3,4-dihydro-5-azabenzo-1,2,3-triazene

The known but long-neglected compound HODhat was shown to be in certain situations a useful peptide coupling additive. Uronium and phosphonium salts with HODhat built into the system were also useful stand-alone coupling reagents. Comparisons with related additives and coupling reagents showed that the new systems were sometimes more and sometimes less effective than previously described systems in the case of stepwise and segment couplings. Applications to assembly of the model decapeptide ACP showed that HDATU was far more effective than HDTU and more effective than HATU under some conditions.