Thio-analogues of 6-Substituted 1, 3-Dimethyl-7-azalumazine (Fervenulin) and 7-Substituted 1, 3-Dimethyl-6-azalumazine (Isofervenulin)

7-(tert-Butyl­diphenyl­sil­yloxy)-2,2-dimethyl-1-benzofuran-3(2H)-one

The title compound, C(26)H(28)O(3)Si, is an allylic oxidation product of the tert-but-yl(2,2-dimethyl-2,3-dihydro-benzo-furan-7-yl-oxy)diphenyl-silane with N-bromo-succinimide and 2,2'-azobis-isobutyronitrile. The nine-atom bicyclic system is almost planar, with an r.m.s deviation of 0.0123 (2) Å and a maximum deviation of 0.031 (2) Å for the O atom. In the crystal, the mol-ecules pile up along...

1′,6-Dimethyl-4′-phenyl­dispiro­[1-benzopyran-3(4H),3′-pyrrolidine-2′,3′′-indoline]-2,2′′-dione

In the title compound, C(27)H(24)N(2)O(3), the five-membered pyrroldine ring adopts an envelope conformation (with the N atom in the flap position) and the six-membered pyran-one ring of the coumarine ring system adopts a slightly distorted boat conformation. The oxindole unit makes dihedral angles of 89.7 (1) and 25.6 (1)°, respectively, with the pyrrolidine ring and the coumarin ring system. ...

3-Chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)pyridazine

In the title compound, C(9)H(9)ClN(4), the dihedral angle between the aromatic rings is 6.25 (9)°. The whole mol-ecule is approximately planar (r.m.s. deviation = 0.070 Å). In the crystal, π-π inter-actions between the centroids of the pyridazine rings [separation = 3.5904 (10) Å] occur.

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Synthesis of 1, 3-diaryl Substituted Iodobenzene Derivatives

The synthesis and characterization a new derivatives of 2'-iodo-meta terphenyl from the reaction ofexcess aryl-Grignard and 2, 6- dichloroiodobenzene with quenching of m-terphenyl-2'-magnesiumbromide by iodine is reported. Via the reactions three carbon-carbon bonds are constructed and mterphenylsare obtained in good yields.