81156-07-2

Basic information

• Product Name: 4,5-dimethyl-2-phenyl-1,3-oxazolium-5-olate
• CAS NO: 81156-07-2
• Molecular Weight: 189.214
• Mol File: 81156-07-2.mol

Chemical Properties

• CAS DataBase Reference: 4,5-dimethyl-2-phenyl-1,3-oxazolium-5-olate(CAS DataBase Reference)
• NIST Chemistry Reference: 4,5-dimethyl-2-phenyl-1,3-oxazolium-5-olate(81156-07-2)
• EPA Substance Registry System: 4,5-dimethyl-2-phenyl-1,3-oxazolium-5-olate(81156-07-2)

Safety Data

• Hazardous Substances Data: 81156-07-2(Hazardous Substances Data)

Upstream product

• 69994-40-7 N-methyl-N-benzoyl-alanine 
• 33099-01-3 N-benzoyl-N-methyl-L-alanine 

Downstream Products

• 1224096-88-1 4-(2-hydroxyphenyl)-1,2-dimethyl-5-phenyl-1H-pyrrole-3-carbonitrile 
• 140241-73-2 1,5-Dimethyl-2-phenyl-1H-pyrrole-3-carboxylic acid methyl ester 
• 140241-72-1 1,2-Dimethyl-5-phenyl-1H-pyrrole-3-carboxylic acid methyl ester 
• 81156-08-3 Bz-L-MeAla-L-ValOMe 
• 81156-08-3 Bz-D-MeAla-L-ValOMe 
• 84707-94-8 N-benzoyl-D-methylalanine-L-alanine methyl ester 
• 81156-05-0 N-benzoyl-L-methylalanine-L-alanine methyl ester 
• 117712-13-7 1,2-dimethyl-4,5-diphenylpyrrole-3-carboxylic acid 
• 117712-14-8 1,5-dimethyl-2,4-diphenylpyrrole-3-carboxylic acid 
• 18780-48-8 1,5-Dimethyl-2,4-diphenyl-1H-pyrrole-3-carboxylic acid methyl ester 
• 140241-78-7 1,2-Dimethyl-4,5-diphenyl-1H-pyrrole-3-carboxylic acid methyl ester 

Relevant articles and documents

N-Substituted and N-unsubstituted 1,3-Oxazolium-5-olates cycloaddition reactions with 3-substituted coumarins

The 1,3-dipolar cycloaddition reaction of unsymmetrically N-substituted and N-unsubstituted 1,3-oxazolium-5-olates with selected 3-substituted coumarins has been examined. Various types of pyrrole derivatives are isolated and their formation seems to be a function of the regio- and diastereochemistry of the initial cycloaddition step.

Regioselectivity in the 1,3-dipolar cycloaddition of muenchnones with two electrophilic alkynes. Attempt of rationalization.

The 1,3-dipolar cycloaddition reaction of several unsymmetrically substituted muenchnones with methyl propiolate 3a and with methyl 3-phenylpropiolate 3b has been examined.The reaction generally proceeds with formation of mixtures of both possible regioisomeric pyrroles.The dipolarophile 3b is more selective than 3a in accordance with the literature.Sustmann's variation-perturbation theory could not account for the observed regioselectivities, this theory gives correct predictions with alkenes as we have shown recently. 1,3-cycloaddition / muenchnones / pyrroles / regioselectivity

ν-Triazolines, XXVI. 1,2,5-Trisubstituted 3-Pyrrolecarbaldehydes from N-Substituted Oxazolium-5-olates and 5-Amino-4,5-dihydro-4-methylene-ν-triazoles

Die Cycloaddition von einigen symmetrisch und unsymmetrisch substituierten N-substituierten Oxazolium-5-olaten (2) an 5-Amino-4,5-dihydro-4-methylen-ν-triazole (1) wird beschrieben.Durch regiospezifische Cycloaddition entstehen instabile Cycloaddukte, die sofort Kohlendioxid und Stickstoff unter Umlagerung zu 1,2,5-trisubstituierten 3-Pyrrolcarbaldehyd-anilen (3) eliminieren.Die Anile werden leicht zu den entsprechenden 1,2,5-trisubstituierten 3-Pyrrolcarbaldehyden (4) hydrolysiert.

Assessment of Racemisation in N-Alkylated Amino-acid Derivatives during Peptide Coupling in a Model Dipeptide System

N.m.r. analysis of diastereoisomeric benzoyl dipeptide esters has been used to monitor racemisation during the coupling of benzoyl-N-alkylated amino-acids to alanine and valine methyl esters.Results confirm the greater susceptibility of these amino-acids