Ai-Qing Wang

Solid‐State Condensation Reactions Between Aldehydes and 5,5‐Dimethyl‐1,3‐cyclohexanedione by Grinding at Room Temperature

Abstract An efficient and convenient approach to the synthesis of the two different products from aldehydes and 5,5‐dimethyl‐1,3‐cyclohexanedione in the solid state by grinding is described. This method provides several advantages such as environmental friendliness, high yields, and simple workup procedure.

Clean, one-pot synthesis of naphthopyran derivatives in aqueous media

Abstract A general and practical one‐pot synthesis of naphthopyran derivatives using hexadecyltrimethylammonium bromide (HTMAB) as catalyst (10 mol%) is described. This method provides several advantages such as neutral conditions, high yields and simple workup procedure. The catalyst is low cost, facile, active, environmentally friendly, and reusable. In addition, water is chosen as a green solvent.

A Clean and Simple Synthesis of 6‐Amino‐4‐Aryl‐5‐Cyano‐3‐Methyl‐1‐Phenyl‐1,4‐Dihydropyrano[2,3‐c]Pyrazole in Water

Abstract A simple and clean method for producing 6‐amino‐4‐aryl‐5‐cyano‐3‐methyl‐1‐phenyl‐1,4‐ dihydropyrano[2,3‐c]pyrazole from aromatic aldehyde, malononitrile and 3‐methyl‐1‐phenyl‐ 2‐pyrazolin‐5‐one catalyzed by hexadecyltrimethylammonium bromide (HTMAB) in water is described. This method provides several advantages such as mild reaction conditions, simple workup procedure, and being environmentally friendly.

An efficient and environment friendly procedure for the synthesis of arylmethylenemalononitrile catalyzed by strong base anion-exchange resin in water

Abstract Knoevenagel condensation of malononitrile with aromatic aldehydes catalyzed by strong base anion‐exchange resin in water results arylmethylenemalononitrile in 74–98% yield at room temperature.

A clean method for producing 4-aryl-7,7-dimethyl-5-oxo-3,4,5,6,7, 8-hexahydrocoumarin in aqueous media

A synthesis of 4-aryl-7,7-dimethyl-5-oxo-3,4,5,6,7,8-hexahydrocoumarin from aromatic aldehyde, 5,5-dimethyl-1, 3-cyclohexadion and Meldrums acid catalysed by hexadecyltrimethylammonium bromide in water is described. This method provides several advantages such as mild reaction conditions, simple work-up procedure and environment friendly.