ABSTRACT Sulfonated ordered nanoporous carbon (CMK-5-SO 3 H) efciently catalyzes the synthesis of perimidines using cyclocondensation of various aldehydes and ketones with 1, 8-diaminonaphthalene in ethanol as a solvent at room temperature. This catalyst can be recovered and reused without significant loss of activity. This methodology provides a simple synthetic route to interesting classes of heterocycles in excellent yields at short time.
![spiro[1,3-dihydroperimidine-2,1'-cyclohexane] Structure](https://image.chemsrc.com/caspic/114/5745-91-5.png)