The title compound, C(21)H(15)NO(4), was synthesized by reducing the Schiff base obtained from acenaphthenequinone and ethyl-4-aminobenzoate. The dihedral angle between the essentially planar 1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinoline ring system [maximum deviation = 0.061 (2) Å] and the benzene ring is 75.08 (10)°. In the crystal, mol-ecules are connected via weak inter-molecular C-H⋯O hyd...

The asymmetric unit of the title compound, C(11)H(17)ClNO(+)·0.5C(2)O(4) (2-), consists of one N-[2-(2-chloro-phen-yl)-2-hydroxy-ethyl]propan-2-ammonium cation and one-half of a centrosymmetric oxalate anion. In the cation, the C/C/N plane of the ethyl-ammonium group is almost perpendicular to the benzene ring, with a dihedral angle of 88.72 (17)°. In the crystal structure, the two components a...

The title compound, C(10)H(11)NO(5), is of inter-est with respect to its anti-dyslipidemic activity. It was prepared by reaction of 4-nitro-phenol with ethyl 2-bromo-2-methyl-propionate followed by ethyl ester hydrolysis. In the crystal, mol-ecules are linked into centrosymmetric dimers by inter-molecular O-H⋯O hydrogen bonds and the dimers are connected into chains by weak C-H⋯O inter-actions....

In the cation of the title salt, C(18)H(23)N(2) (+)·C(24)H(20)B(-), the pyridine ring forms a dihedral angle of 14.23 (6)° with the benzene ring. One of the ethyl groups of the cation was refined as disordered over two sets of sites with equal occupancies.

A highly efficient, two-step sequence method for the deoxygenation of hydroxyl groups has been developed. The method involves the preparation of the 2-(2-iodophenyl)ethyl methyl phosphite derivative of an alcohol using methyl dichlorophosphite and 2-(2-iodophenyl)ethanol. Treatment of the phosphite intermediate with (n-Bu)3SnH/AIBN in refluxing benzene cleanly produces the deoxygenation product...

The title compound, C(19)H(17)NO(3), was synthesized using a tandem annulation reaction between 4-benzoyl-1H-pyrrole-2-carbaldehyde and (E)-ethyl 4-bromo-but-2-enoate under mild conditions. The dihedral angle between the benzene ring and the indolizine ring system is 41.73 (4)°.

Competitive kinetic experiments utilising free radical carbonylation chemistry provide a first estimate for the rate constant for 6-endo cyclization of the 6-aza-7-ethyl-5-hexenoyl radical of (4.8 +/- 2.4) x 10(6) s(-1) at 90 degrees C in benzene, in good agreement with ONIOM-G3(MP2)-CC+COSMO-RS calculations (6.8 x 10(6) s(-1)).

In the title compound, C18H21N2O6P, the dihedral angle between the benzene and phenyl rings is 85.1 (2)°. In the crystal, mol-ecules are linked via pairs of N-H⋯O(=P) hydrogen bonds, forming inversion dimers with graph-set notation R 2 (2)(10). One of the ethyl groups is disordered over two sets of sites, with occupancies 0.746 (11) and 0.254 (11).

In the title compound, C(19)H(18)O, the exocyclic C=C double bond has an E configuration. The ethyl substituent on the cyclo-hexa-none ring is in an axial position. The cyclo-hexa-none ring adopts a half-chair conformation, presumably due to conjugation in the benzene ring.

The title compound, C(9)H(14)N(+)·C(7)H(7)SO(3) (-), contains a 2-ethyl-6-methyl-anilinium cation and a 4-methyl-benzene-sulfonic anion. The cations are anchored between the anions through N-H⋯O hydrogen bonds. Electrostatic and van der Waals inter-actions, as well as hydrogen bonds, maintain the structural cohesion.