An expeditious synthesis of 1,5-benzodiazepine derivatives catalyzed by CdCl₂

2716-27192,3-Dihydro-1H-1,5-benzodiazepines have been synthesized by the condensation of o-phenylenediamine and cyclic or acyclic ketones in the presence of CdCl2 as catalyst at 80-85ºC temperature. The yields are high and the reactions go to completion within 10-20 min. </b

Sn/NH₄Br assisted selective reduction of nitroarenes into anilines under neutral conditions

2464-2466A simple, cost-effective method for the reduction of aryl nitro compounds by tin in the presence of ammonium bromide in methanol to anilines is reported

Sodium carbonate: A versatile catalyst for Knoevenagel condensation

1428-1431Catalytic amounts of sodium carbonate (Na2CO3) catalyze the condensation of aromatic aldehydes with active methylene compounds to afford arylmethylidene products under the grindstone method. The reactions go to completion within 1-5 min at 26ºC and give products in excellent yield

One pot synthesis of 3,4-dihydropyrimidin-2(1<i style="">H</i>)-ones/-thiones catalysed by zinc chloride: An improved procedure for the Biginelli reaction using microwaves under solvent free condition

823-826Zinc chloride efficiently catalyzes the three-component coupling of β-keto ester, substituted aldehyde and urea or thiourea to afford the corresponding 3,4-dihydropyrimidin-2(1H)-ones/thiones respectively, the new protocol for the Biginelli reaction under microwave irradiation works in the absence of solvent, the yields are high and the reaction goes to completion within 20-35 sec

MgCl₂•6H₂O/p-TSA catalyzed simple and efficient synthesis of some known and novel quinolines

1160-1164A simple and efficient method has been developed for the synthesis of some important fused quinolines from o-aminoaryl ketones and α-methylene ketones in the presence of catalytic amounts of MgCl₂•6H₂O/p-TSA in high yield. The reaction works at ambient temperature to give the products within 40 min