Phenol, 2-methoxy-4-vinyl

Phenol, 3-[2-(3-hydroxy-4 -methoxy-pheny 1 )-ethyl]-ethyl-5-methoxy 1 3172 Phenol, 3 - [2- (3 -iso-prenyl-4-hydroxy-5-methoxy-phenyl) -ethyl]-5-methoxy Pl 3172 Phenol, 3-[2-(4-hydroxy-phenyl)-ethyl]-5-methoxy 1 3172 Phenol, 4-vinyl Aer ... 

The information obtained from the detector is used to generate the mass spectrum. The mass spectrum is a plot of the intensity of the individual mass-analyzed ions plotted as a function of m/z. Usually the most intense ion, termed the base peak, is given a relative abundance of 100% and the rest of the ions in the mass spectrum are normalized to this intensity. Figure 5.1 shows the El mass spectrum of 2-methoxy-4-vinyl phenol (molecular weight 150 Daltons). The base peak is the molecular ion at m/z 150, a radical... 

In the lithium and cesium enolates of o-methoxyacetophenone, the methoxy oxygen coordinates with the smaller lithium cation but not with the cesium cation . Other examples of lithium enolate chemistry include a thermochemical analysis of the aldol reaction of lithiopinacolonate with pivalaldehyde and a comparison of the proton affinities and aggregation states of lithium alkoxides, phenolates, enolates, -dicarbonyl enolates, carboxylates and amidates. Although the lithium enolate of cyclopropanone itself remains unknown, derivatives (accompanied by their aUenoxide isomer) have been implicated in the reaction of a-(trimethylsilyl) vinyl lithium with CO. That both species are seemingly formed is surprising because cyclopropanone enolate is expected to be much less stable than its acyclic isomer cyclopropene is less stable than allene by almost 90 kJmol-. ... 

CIC Vanillin, the main component in vanilla flavour is the basic key ingredient for the creamy, sweet character. All other volatile flavouring compounds have been identified only in small traces. Among them 2-methoxy phenol and 2-methoxy-4-vinyl phenol are responsible for the phenolic, smoky odour. 4-Methoxy benzalde-hyde, 3,4-methylene-dioxy-benzaldehyde, methyl benzoate and methyl ciimamate impart the warm, powdery, aromatic floral character. Vitispirane adds a fruity, floral topnote. Natural vanilla extract blends very well with other flavourings and it has been modified in different directions ethyl vanillin is used to increase the sweet, creamy vanillin aspect. Tonka beans and coumarin add a full, dried hay, slightly caramel-like custard aspect, supported by the butter notes of diacetyl and 4-hydroxy-decanolide. 

The study of the outer root bark of T. hypoglaucum collected in China afforded three new structures of phenolic triterpenes. Duan et al. isolated triptohypol A (80), B (81) and C (82), a series of new phenolic compounds related to celastrol [29]. Triptohypol A (80) was isolated as an amorphous powder and spectroscopic means and chemical modification determined its structure. By HREIMS the formula C30H40O6 was determined, and H-NMR spectrum showed five methyl signals, a methoxy moiety, a methylene attached to an oxygen atom and two vinyl protons. Data from 13C-NMR experiments indicated the presence of a pair of carbonyl groups and was quite similar to that of wilforol A (78). The analysis of HMQC and HMBC experiments allowed to establish the structure for rings A and B, based on the correlations observed between the proton H-l (8 6.95 ppm) and the carbons C-3, C-5 and C-10. Finally, the position of the carbonyl group was established at C-6 based on a NOESY experiment of the dimethyl derivative. 

Vinyl isocyanate added slowly to 2-( 1 -methoxy-2-chloroethoxy)phenol (2-HOC6H4OR, R = CH(OMe)CH2CI) In toluene containing triethylamine and the reaction completed at 40-50°C during 1 hour afforded the corresponding vinyl carbamate in 57% yield. The technique is probably of general application and may have synthetic potential (ref.27). 

Methoxybutanol [30677-36-2] (3-methoxy-l-butanol) is a mild-smelling liquid that is miscible with water and organic solvents. It has a good solvency for cellulose nitrate, cellulose esters, poly(vinyl butyral), ketone resins, phenol-, urea-, and... 

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