4 + + + +4
Catalyst
Solvent

Acetaldehyde is reacted with aqueous ammonia to give MEP, plus byproducts of 2 and 4-picoline (methyl pyridine). The products are isolated by fractional distillation.

Industrial Organic Chemistry, 3rd. Ed. K. Weissermel, H.-J. Arpe, VCH (1997)

Reaction defined as:
Condensation
Cyclisation
Industrial Process: Organic