Synthesis and Crystal Structure of 1,7,8,9-Tetr achlo ro-4-b enzyl- 10,10-dimethoxy- 4-azatricyclo（5,2,1,0^2,6）dec-8-ene-3,5-dione

摘要

The crystal structure of 1,7,8,9-tetrachloro-4-benzyl-10,10-dimethoxy-4-azatricyclo- (5,2,1,0^2,6)dec-8-ene-3,5-dione (C18H15Cl4NO4, Mr = 451. 11) has been determined by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P21/c with a = 18.6488(2), b = 13.06430(10), c = 16.1086(2)A, β = 92.9870(10)°, V = 3919.26(7) A3, Z = 8, Dc = 1.529 g/cm3,μ = 5.711 mm-1, F(000) = 1840, the final R = 0.0599 and wR = 0.1664 for 5645 observed reflections. The title compound is composed of a polycyclic fused pyrrolidine ring system. Three symmetric fused five-membered-ring structures were formed by the Diels-Alder reaction between N-benzylmaleimide and 5,5-dimethoxy-1,2,3,4-tetrachlorocydopentadiene.