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.
(EN) Compounds of formula (I), wherein R1, R2, A and B are defined hereinbelow. The compounds of the present invention inhibit brain acetylcholinesterase and are useful in the treatment of Alzheimer's disease.(FR) Des composés de formule (I) où R1, R2, A et B ont la notation ci-après, inhibent l'acétylcholinestérase cérébrale et sont utiles dans le traitement de la maladie d'Alzheimer.