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Cross-dehydrogenative couplings of two different C-H bonds have emerged as an attractive goal in organic synthesis. However, achieving regioselective C-H activation is a great challenge because C-H bonds are ubiquitous in organic compounds. Actually, the regioselective couplings promoted by enzymes are a common occurrence in nature. Herein, we have… (More)
In the title phospho-nate, C19H21O9P, the dihedral angle between the benzene rings is 63.33 (3)°, and the P atom has a distorted tetra-hedral geometry, with angles in the range 101.30 (6)-120.38 (6)°. No significant inter-molecular inter-actions are observed in the crystal structure, and π-π inter-actions between symmetry-related benzene rings are beyond 4… (More)
In the asymmetric unit of the title compound, C17H12F3NO4S, there are two conformationally similar mol-ecules in which the heterocyclic thia-zine ring adopts a half-chair conformation, with the dihedral angle between the two benzene rings being 24.84 (8) and 37.42 (8)°. In the crystal, the mol-ecules form dimers through cyclic carb-oxy-lic acid O-H⋯O… (More)
In the title compound, C17H12F3NO4S, the heterocyclic thia-zine ring adopts a half-chair conformation and the dihedral angle between the benzene rings is 43.28 (9)°. The α,β-unsaturated C=C group is inclined at an angle of 21.0 (3)° to the benzene ring of the benzo-thia-zine moiety. In the crystal, inversion dimers linked by pairs of carb-oxy-lic acid O-H⋯O… (More)
In the mol-ecule of the title compound, C(16)H(12)ClF(3)N(2)O(4)S, the thia-diazine ring adopts a half-chair conformation. The dihedral angle between the benzene ring of the benzothia-diazine ring system and trifluoro-phenyl group is 15.02 (7)°. In the crystal, centrosymmetrically related mol-ecules are linked into dimers via pairs of O-H⋯O hydrogen bonds,… (More)
In the title compound, C(17)H(12)F(3)NO(4)S, the heterocyclic thia-zine ring adopts a half-chair conformation with the S and the N atoms displaced by -0.608 (3) and 0.105 (3) Å, respectively, from the mean plane formed by the remaining ring atoms. The dihedral angle between the two benzene rings is 36.63 (8)° and the acetic acid group is inclined at right… (More)