(R,R/S,S)-9-Benzyl-3-methyl-7-phenyl-1,6-dioxa-3,9-diazaspiro[4.4]nonane-2,8-dione

Abstract

The title compound, C19H18N2O4, a rare example of a spirocyclic orthoamide, was synthesized by a double cyclization of a N-Boc protected sarcosine derivative. The crystal structure of the racemic (R,R/S,S) modification reveals two near-orthogonal five-membered heterocyclic ring systems, each in an envelope configuration.

Keywords

• crystal structure
• spirocyclic compounds
• cyclization reactions
• oxazolidinone