Synthesis and structure--antibacterial activity relationships of 7-(3-amino-1-propynyl and 3-amino-1-propenyl)quinolones

Ethyl 8-chloro-1-cyclopropyl-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate

In the mol­ecule of the title compound, C₁₅H₁₂ClF₂NO₃, the quinoline ring system is not planar, the dihedral angle between the pyridine and benzene rings being 3.55 (8)°. In the crystal, inter­molecular C—H⋯O hydrogen bonds link the mol­ecules into layers parallel to (101).

Synthesis and in vitro antiproliferative activity of novel (4-chloro- and 4-acyloxy-2-butynyl)thioquinolines

The series of new acetylenic thioquinolines containing propargyl, 4-chloro-2-butynyl, and 4-acyloxy-2-butynyl groups have been prepared and tested for antiproliferative activity in vitro against human [SW707 (colorectal adenocarcinoma), CCRF/CEM (leukemia), T47D (breast cancer)] and murine [P388 (leukemia), B16 (melanoma)] cancer lines. Most of the obtained compounds exhibited antiproliferative activity, especially compounds 8, 12, and 21 showed the ID₅₀ values ranging from 0.4 to 3.8 μg/ml comparable to that of cisplatin used as reference compounds.

Ethyl 7-amino-1-cyclopropyl-6-fluoro-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylate monohydrate

In the title compound, C₁₆H₁₇FN₂O₄·H₂O, the dihedral angle between the heterocyclic ring and the benzene ring is 5.77 (9)°, that between the heterocycle and the ethoxy­carbonyl plane is 15.5 (1)°, and that between the heterocyclic ring and the cyclopropane ring is 67.75 (13)°. In the crystal structure, mol­ecules are linked into a ribbon-like structure along the c axis by N—H⋯O and O—H⋯O hydrogen bonds.