Synthesis of optically active 1,3-dimethylallantoins via (−)-menthyl ethers of their bicyclic tautomers
作者:Nevenka Modrić、A.F. Drake、M. Poje
DOI:10.1016/s0040-4039(01)80571-2
日期:1989.1
Availability of both diastereomers of 1-(−)-menthoxy-2,4-dimethyl-3,7-dioxo-2,4,6,8-tetraazabicyclo[3.3.0]octane (5) through decarboxylative rearrangement of 5-(−)-menthoxy-1,3-dimethyl-isouric acid (1) allowed the access to both enantiomers of 1,3-dimethylallantoin (6); circular dichroism spectra of the related homologues (−)-6a and (−)-allantoin proved their corresponding R-configurations.