92541-13-4

Upstream product

• 5457-19-2 5-methyltetronic acid 
• 92541-12-3 6-(2-Benzyloxy-3,4-dimethoxy-phenyl)-2-[6-(4-methoxy-benzyloxy)-quinolin-2-yl]-5-methyl-pyridine-3,4-dicarboxylic acid dimethyl ester 
• 92562-98-6 6-(2-Benzyloxy-3,4-dimethoxy-phenyl)-2-(6-hydroxy-quinolin-2-yl)-5-methyl-pyridine-3,4-dicarboxylic acid dimethyl ester 
• 92541-09-8 2-(2-Benzyloxy-3,4-dimethoxy-phenyl)-3,7-dimethyl-5-oxo-1-oxy-5,7-dihydro-furo[3,4-b]pyridine-4-carboxylic acid methyl ester 
• 92541-11-2 2-(2-Benzyloxy-3,4-dimethoxy-phenyl)-7-hydroxy-3,7-dimethyl-5-oxo-5,7-dihydro-furo[3,4-b]pyridine-4-carboxylic acid methyl ester 
• 92541-08-7 2-(2-Benzyloxy-3,4-dimethoxy-phenyl)-3,7-dimethyl-5-oxo-5,7-dihydro-furo[3,4-b]pyridine-4-carboxylic acid methyl ester 
• 92562-97-5 2-(2-Benzyloxy-3,4-dimethoxy-phenyl)-3,7-dimethyl-5-oxo-5,7-dihydro-furo[3,4-b]pyridine-4-carboxylic acid 
• 92541-10-1 2-(2-Benzyloxy-3,4-dimethoxy-phenyl)-3-methyl-7-methylene-5-oxo-5,7-dihydro-furo[3,4-b]pyridine-4-carboxylic acid methyl ester 
• 92541-07-6 2-(2-Benzyloxy-3,4-dimethoxy-phenyl)-3,7-dimethyl-5-oxo-5,7-dihydro-furo[3,4-b]pyridine-4-carbaldehyde 
• 92541-06-5 2-(2-Benzyloxy-3,4-dimethoxy-phenyl)-3,4,7-trimethyl-7H-furo[3,4-b]pyridin-5-one 
• 77418-04-3 4-(4-Methoxy-benzyloxy)-2-[(E)-p-tolylimino-methyl]-phenylamine 
• 92541-05-4 (Z)-3-Amino-1-(2-benzyloxy-3,4-dimethoxy-phenyl)-2-methyl-but-2-en-1-one 
• 74-88-4 methyl iodide 

Relevant academic research and scientific papers

AN UNUSUAL REARRANGEMENT DURING PYRIDINE SYNTHESIS. ANOMALOUS CONDENSATION OF A β-KETO ENAMINE WITH A TETRONIC ACID.

The condensation of a β-keto enamine 1 with 5-methyltetronic acid takes an anomalous course.Single crystal X-ray analysis and chemical evidence establish the rearranged pyridine structure 15 for this condensation product.