## Abstract On the basis of coupling constants and chemical shifts the conformation of __meso__ and __racemic__ 2,3,4‐trichloropentanes have been determined. The __meso__ isomer exists as an equilibrium between the expected rotameric forms but the __racemic__ isomer is anomalous and exists almost e
Degradation of the diarylpropane lignin model compound 1-(3′,4′-diethoxyphenyl)-1,3-dihydroxy-2-(4′'-methoxyphenyl)-propane and derivatives by the basidiomycetePhanerochaete chrysosporium
✍ Scribed by Akio Enoki; Michael H. Gold
- Publisher
- Springer
- Year
- 1982
- Tongue
- English
- Weight
- 770 KB
- Volume
- 132
- Category
- Article
- ISSN
- 0302-8933
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N-t-Butylacetamidines 1 on heating with methyl vinyl ketone, acrolein or crotonaldehyde gave the 2,3-dihydropyridine derivatives 4, 5 or 6 via N-alkylation of the acetamidines 1. Reaction of amidines 1 with phenyl 1-propenyl ketone, benzalacetone or chalcone gave 3,4-dihydropyridine derivatives 8, 9
N-t-Butylacetamidines 1 on heating with methyl acrylate (2) at 200˚ gave the 4,5-dihydro-3H-pyridin-2one derivatives 5. Michael addition of the acetamidines 1 as their ene-1,1-diamine tautomers 1' to 2 and the subsequent cyclization of the adducts gave derivatives 5. Amidines 1 on reaction with trim