[reaction: see text] Various ferrocene-based organosilanols have been synthesized in four steps starting from achiral ferrocene carboxylic acid. Applying these novel planar-chiral ferrocenes as catalysts in asymmetric phenyl transfer reactions to substituted benzaldehydes afforded products with high enantiomeric excesses. The best result (91% ee) was achieved in the addition to p-chlorobenzalde...

The partial purification of the enzyme, aromatic aldehydeketone reductase (aromatic A-K reductase), from rabbit kidney cortex is described. Aromatic A-K reductase utilizes TPNH but not DPNH as a cosubstrate. Substituted benzaldehydes and acetophenones are readily reduced to carbinols. Aromatic A-K reductase does not, however, catalyze the reverse reaction, the dehydrogenation of carbinols under...

In the past few years multi component reactions have captured the attention of synthetic chemists as they provide  easy  access  to diverse  complex  organic molecules through  carbon -  carbon   and  carbon - heteroatom  bond  formations  in tandem manner with simple easy  to carry out  reaction  conditions in short  time. 1,8-dioxo-octahydroxanthene is a significant class of oxygen containing...

A convenient procedure for the synthesis of 5-(4-acetamidophenyl)-10,15,20tris(4-substituted phenyl) porphyrins from dipyrrolomethane is reported. meso-(4Substituted phenyl) dipyrrolomethanes were obtained in yields of 72-84%. The amide porphyrins were isolated with appreciable yields of 15-17%. Introduction The design of new material systems involves the synthesis of asymmetric porphyrins. Thu...

A versatile and straightforward strategy to construct a xanthone skeleton via an intermolecular catalytic coupling of 2-substituted benzaldehydes and a wide range of phenols has been developed. For this purpose, a novel and magnetically recoverable catalyst consisting of copper nanoparticles on nanosized silica coated maghemite in absence of ligand is presented. The reaction proceeds smoothly w...

Some new [3-(4-phenyl)-5-phenyl-4,5-dihydropyrazol-1-yl](pyridine-4-yl)methanones and 3-substituted phenyl-5-substituted phenyl-4,5-dihydro-pyrazole-1-carbothioamides have been synthesized employing microwave techniques and evaluated for antimicrobial activity. Substituted acetophenones (1) were reacted with appropriately substituted benzaldehydes (2) in the presence of ethanol to furnish subst...

Novel 4-(4-substituted phenyl)-5-(3,4,5-trimethoxy/3,4-dimethoxy)-benzoyl-3,4-dihydropyrimidine-2(1H)-one/thione derivatives (DHP1-9) were designed, synthesized, characterized and evaluated for antitumor activity against cancer stem cells. The compounds were synthesized in one pot. Enaminones E1 and E2 were reacted with substituted benzaldehydes and urea/thiourea in the presence of glacial acet...