Titanium(IV) chloride promoted condensation of ortho-aminonitriles with δ-valerolactone
作者:Manoj C. Desai、Peter F. Thadeio
DOI:10.1016/s0040-4039(01)93747-5
日期:1989.1
The condensation of vicinal alicyclic or aromatic ortho-aminonitriles with δ-valerolactone is promoted by titanium(IV) chloride at room temperature in the presence of triethylamine to afford substituted 2,3-dihydropyrano[2,3-]pyridines. These compounds are potentially useful as memory enhancing agents.
Compounds of the formula
wherein A, B, R¹ and R² are defined below.
The above compounds inhibit brain acetylcholinesterase and are useful in the treatment of Alzheimer's disease.