Structure Determination of 8-Benzyl-5-phenyl-3-oxa-4,8-diazatricyclo[5.2.1.02,6]dec-4-ene and 1-(9-Ethoxy-5-phenyl-3-oxa-4,8-diaza-tricyclo[5.2.1.02,6]dec-4-en-8-yl)-ethanone: Their Synthesis, Chemical Relationship and Comparison with Similar Compounds

The molecular and crystal structures of 8-benzyl-
5-phenyl-3-oxa-4,8-diaza-tricyclo[5.2.1.02,6]dec-4-ene 11a
and 1-(9-ethoxy-5-phenyl-3-oxa-4,8-diaza-tricyclo[5.2.1.02,6]
dec-4-en-8-yl)-ethanone 13a have been XRD determined.
The compounds crystallize in the monoclinic system with
space groups P21/n and P21/c, respectively. The synthesis
and chemical relationship between the two compounds are
reported and their structures are compared with others of the
aza-norbornene and isoxazoline families.