experiments with glutaraldehyde and primary alkyl amines as model componds revealed that the cyclic form of the aldehyde gave the unstable n-alkyl-2,6-dihydroxypiperidine , which either looses water to give n-alkyldihydropyridine or condenses with 2,6-dihydroxytetrahydropyran to yield a copolyether which was isolated .
C0017814
glutaraldehyde
C0001992
aldehyde