(Z)-3',6'-Bis(diethyl-amino)-2-(4-oxopent-2-en-2-yl-amino)-spiro-[isoindoline-1,9'-xanthen]-3-one.
In the title compound, C(33)H(38)N(4)O(3), the mean planes of the 9H-xanthene unit and spiro-lactam (nine-atom) core are almost mutually perpendicular at 87.26 (6)°. Intra-molecular N-H⋯O and C-H⋯N inter-actions influence the 4-oxo-pent-2-en-2-yl-amino conformation. In the crystal, weak C-H⋯O hydrogen bonds link the mol-ecules into chains along [001].
Department of Chemistry, Capital Normal University, Beijing 100048,  People's Republic of China.
Chang-Bin
CB
Guo
Ri-Cai
RC
He
Ai-Min
AM
Li