2-Methyl-3-acetylpyrrole

Scheme 19.—Mechanism for Formation of 2-Acetylpyrrole and 2-Methyl-3-pyridinol.

Acetylpyrrole, Oxoetbylpyrrole or Methyl-pyrrylketone, C4H7NO. One isomer is listed in Beil 20,165 and another in Beil 21,271,(280) [ 236]... 

A third route to 3-vinylpyrrole complexes originates from 3-acyl-pyrrole complexes and readily provides access to alkoxy-substituted P-vinylpyrrole complexes. The carbonyl oxygen on these complexes is nucleophilic, and treatment of the 3-acetylpyrrole complex 38 with methyl triflate gives the methoxy-2-azafulvenium complex 143. Addition of DBU to 143 at low temperature results in deprotonation of the pendant methyl group on C-6 to give the methoxy-substituted P-vinylpyrrole complex 144 (Figure 26). 

Appendix V), 104 Acetyl Methyl Carbinol, 64 2-Acetylpyrrole, 64 2-Acetyl Thiazole, 64, 94... 

The asymmetric Jt-basic moiety [Re(Tp)(CO)(Meim)] gives thermally stable complexes with ethyl acetate, acetic anhydride, N-methylsuccinimmide, N-acetylpyrrole, and N-methylmaleimide. X-ray and NMR data for [Re(Tp)(CO)(Meim)(T]2-N-methyl-succinimide)] have also been reported.222... 

K.50) (K.50) Ethanone, l-(l//-pyrrol-2-yl)-, l-(pyrrol-2-yl)ethanone, methyl pyrrol-2-yl ketone, 2-acetylpyrrole [1072-83-9] FEMA 3202... 

Fig. 9- Functional group analysis of alcohols. Chromatograms of separation of (A) the initial mixture and (B) the mixture after separation and subtraction of alcohols in a reactor containing boric acid connected in series with the column. Peaks 1 = rer/.-butanol 2 = n-butanol a = cumene 3 = linalool 4 = menthol b = methyl phenylacetate 5 = benzyl alcohol c = 2-acetylpyrrole. Reprinted with permission from ref. 29.

In the presence of sulfur compounds (e.g. cysteine) pentoses and methylpentoses produce, in addition to 4-hydroxy-5-methyl-2H-furan-3-one and 4-hydroxy-2,5-dimethyl-2ff-furan-3-one, respectively, related compounds containing sulfur in the molecule. Many of these compounds resemble the aroma of cooked or roasted meat. In the presence of primary amines, 1-deoxyhexo-2,3-diuloses derived from disaccharides yield pyridinium betaines and, further, pyrid-4-ones and isomeric 2-acetylpyrroles. The reaction with secondary amines leads to N-substituted... 

---