M anuela Klein, Ivar Ugi* Organisch-Chemisches Institut der Technischen Universität München, Lichtenbergstraße 4. D-85748 Garching, Germany Z. Naturforsch. 50b, 948-952 (1995); receifed November 11, 1994 Oligonucleotides, Phosphite Triesters Chloro-N,N-dimethylaminoand chloro-N,N-diisopropylamino-2.2,2-trichloro-/‘eA-r-butoxyphosphine are demonstrated as reagents in the automated solid-phase ol...

The title compound, C(20)H(10)Cl(6)O(2), a quinone derivative, was obtained by the irradiation of 2,3,5,6-tetra-chloro-benzo-quinone and 4,4'-(ethene-1,1-di-yl)bis-(chloro-benzene). The six- and four-membered rings are fused in a cis configuration. The dihedral angle between them is 53.4 (3)°.

The synthesis of 5,6- and 7,8-diaminoquinoline derivatives starting from angularly annelated selenadiazoloquinolones is presented. Simple chlorination of the pyridone ring followed by reductive deselenation of the 1,2,5-selenadiazole ring afforded novel 4-chloro-o-diaminoquinolines. Dechlorination of 4-chloro-7,8-diaminoquinoline gave 7,8-diaminoquinoline hydrochloride which was successfully em...

In the title compound, C(23)H(17)Cl(3)N(4)O, the benzene rings are oriented with respect to the pyrazole ring at dihedral angles of 39.9 (2) and 72.90 (13)° for the chloro-phenyl and di-chloro-phenyl rings, respectively. Inter-molecular C-H⋯N and C-H⋯Cl inter-actions are observed in the crystal packing.

A series of 5-aryl-1,4-benzodiazepines with chloro- or fluoro-substituents in the second ring have been synthesized and their anti-inflammatory, myeloperoxidase and anticancer properties studied. The synthesized compounds showed potential anti-inflammatory and anticancer activities, which were enhanced in the presence of a chloro-substituent in the second ring of the 5-aryl-1,4- benzodiazepine.

In the present study, the oxidation of 3-(4-chloro-1H-imidazol-5-yl)-1-(2-hydroxyphenyl)prop-2-en-1ones with mercuric(II) acetate in in polyethylene glycol (PEG-400) gave the corresponding 2-((4-chloro-1Himidazol-5-yl)methylene)benzofuran-3(2H)-ones. Newly synthesized compounds were tested for their in vitro antimicrobial activity.

The title compound, C(22)H(17)ClN(2)O(2), was synthesized by the condensation reaction between 1,2-phenyl-enediamine and 2-chloro-3',4'-dimeth-oxy-benzil in boiling acetic acid. The chloro-phenyl and dimeth-oxy-phenyl rings make dihedral angles of 78.45 (5) and 35.60 (4)°, respectively, with the quinoxaline unit.

In the title compound, C(19)H(12)Cl(2)F(3)N(3)O(2)S, the 3-chloro-phenyl and 4-chloro-phenyl rings form dihedral angles 89.5 (2) and 11.4 (2)°, respectively, with the pyrazole ring. In the crystal, mol-ecules related by translation along the a axis are linked into chains via C-H⋯N hydrogen bonds.

In the title mol-ecule, C(17)H(11)Cl(2)N(3)O, the C=C bond connecting the triazole and 4-chloro-phenyl groups adopts a Z geometry. The dihedral angles formed by the triazole ring and the 4-chloro substituted benzene rings are 67.3 (1) and 59.1 (1)°. The dihedral angle between the two benzene rings is 73.5 (1)°.