N-benzylideneanilines 1 react with methyl 3-aminocrotonate 2 in the presence of solid acidic catalysts (K10 montmorillonite or ZF520 zeolite) to give dimethyl 4-(substituted)phenyl-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylates 3 as major products. Methyl 2-(methoxycarbonylmethylene)-6-methyl-4-(substituted)phenyl-1,2,3,4-tetrahydro- 5-pyridinecarboxylates 4 and methyl 4-(methoxycarbonylmethyl)-2-methyl-6-(substituted)phenyl-3-pyridinecarboxylates 5 were isolated as minor products.
|Number of pages||8|
|Publication status||Published - Dec 1 1998|
ASJC Scopus subject areas
- Organic Chemistry