Synthese deso-Oxy-flavons (2′-Oxy-flavons)

2-[(4,6-Dimeth­oxy­pyrimidin-2-yl)­oxy]benzaldehyde

In the title compound, C(13)H(12)N(2)O(4), the dihedral angle between the benzene and pyrimidine rings is 55.57 (13)°. The carbonyl group and the two methoxyl groups are approximately coplanar with the benzene ring and pyrimidine ring; the C-C-C-O, C-O-C-N and C-O-C-C torsion angles being -6.1 (5), -4.8 (4) and 179.9 (3)°, respectively. In the crystal, mol-ecules are linked via C-H⋯O inter-acti...

2-[(2-Acet­oxy­benzo­yl)­oxy]benzoic acid

The title compound, C(16)H(12)O(6), is a common impurity of ortho-acetyl-salicylic acid (aspirin). The benzene rings form a dihedral angle of 81.9 (1)° while the acetyl and carboxyl groups form dihedral angles of 74.0 (1) and 26.4 (2)°, respectively, with the benzene rings to which they are bound. In the crystal, mol-ecules are linked by pairs of O-H⋯O hydrogen bonds between the carboxyl groups...

2-[(tert-But­oxy­carbonyl­amino)­oxy]acetic acid

The title compound, C(7)H(13)NO(5), was prepared by the condensation of O-(carb-oxy-meth-yl)hydroxyl-amine and (Boc)(2)O (Boc = but-oxy-carbon-yl).In the crystal, mol-ecules are linked by weak inter-molecular N-H⋯O hydrogen bonds.

2,4-Bis[(prop-2-yn­yl)­oxy]benzaldehyde

In the title compound, C(13)H(10)O(3), two prop-2-yn-yloxy groups are attached to the benzaldehyde ring at positions 2 and 6. The crystal packing features C-H⋯O inter-actions.

Oxy-coal Combustion Studies