Crystal structure determination of rac-11'-(1-acetyl-1H-indazol-3-yl)-11',11a'-di-hydro-10'H,17'H-spiro-[indene-2,18'-[5a,16b]methano-tri-indeno[1,2-b:1',2'-d:2'',1''-g]oxocine]-1,3,10',12',17'(10a'H)-penta-one aceto-nitrile 1.5-solvate

The title compound, C46H26N2O7·1.5CH3CN, is the aldol condensation product of bindone with indazole-3-carbaldehyde followed by double inter-molecular cyclization. The asymmetric unit, which has monoclinic P21/c symmetry, contains two independent mol-ecules of the title compound and three aceto-nitrile mol-ecules. The title mol-ecule comprises a central eight-membered ring, which contains an enol-ester, from which five arms extend. The arms exhibit inter-molecular inter-actions within the crystal lattice between mol-ecules of the title compound and with co-crystallized solvent mol-ecules (aceto-nitrile).

Synthesis and biological evaluation of indolyl bisphosphonates as anti-bone resorptive and anti-leishmanial agents

A series of indole conjugated bisphosphonate derivatives have been synthesized and evaluated for their in vitro anti-bone resorptive activity using bone marrow osteoclast culture. Two bisphosphonates 23 and 24 significantly inhibited osteoclastogenesis, 23 showed inhibition at 10 and 100 pM which was lower than the concentration of standard drug alendronate, and 24 inhibited osteoclastogenesis at 100 nM which was comparable to alendronate. Two other compounds 13 and 14 also showed inhibition comparable to alendronate, but were cytotoxic in the osteoblast cells. The two active bisphosphonates 23 and 24 induced significant osteoclast apoptosis at concentrations 100 nM for compound 24 and at 10 pM for compound 23 compared to alendronate. In vivo effect of active bisphosphonates 23 and 24 resulted in osteoclastogenesis of bone marrow cells (BMCs) to almost 40-50% (23 showing 8.4% decrease and 24 showing 9.0%) compared to 16.5% of the ovariectomized group. Further, screening of anti-leishmanial activity, four compounds 24-25 and 27-28 showed more than 80% inhibition against both the promastigote and amastigote stages of the Leishmania parasite.

One Pot Synthesis of tetrahydroquinoline-5-thiones and Evaluation of their Antimicrobial Activities

One-pot syntheses of various tetrahydroquinoline-5-thiones are reported. The antimicrobial activity of the obtained products against various types of bacteria was estimated.

Synthesis and biological evaluation of new quinazoline and cinnoline derivatives as potential atypical antipsychotics

Four new diaza analogues (14, 15, 23, and 24) of the conformationally constrained aminobutyrophenone derivatives QF0104B (5) and QF0108B (6) were synthesized (Schemes 2 and 3), and evaluated for their binding affinities (Table) towards the serotonin 5-HT2A and 5-HT2C, and the dopamine D2 receptors. Among the new compounds, the quinazoline derivative 15 (= 7-{[4-(4-fluorobenzoyl)piperidin-1-yl]methyl}-5,6,7,8-tetrahydroquinazolin-5-one) exhibited the highest affinities towards the serotonin 5-HT2A and dopamine D2 receptors, and it is in the borderline of potential atypical antipsychotics. The cinnoline derivative 23 (= 7-{[4-(4-fluorobenzoyl)piperidin-1-yl]methyl}-5,6,7,8-tetrahydro-3-methylcinnolin-5-one) displayed high selectivity in its binding profile towards the 5-HT2C compared to both the 5-HT2A and D2 receptors.