Yuan Gao

A CONVENIENT SYNTHESIS OF 2-AMINO-5,6,7,8-TETRAHYDRO-5-OXO- 4-ARYL-7,7-DIMETHYL-4H-BENZO-[b]-PYRAN-3-CARBONITRILE UNDER MICROWAVE IRRADIATION

ABSTRACT A series of 2-amino-5,6,7,8-tetrahydro-5-oxo-4-aryl-7,7-dimethyl-4H-benzo-[b]-pyran-3-carbonitrile were synthesized by reaction of benzylidenemalononitrile derivatives and 5,5-dimethyl-1,3-cyclo-hexanedione under microwave irradiation without catalyst and solvent free.

A CONVENIENT SYNTHESIS OF 9-ARYL-3,3,6,6-TETRAMETHYL-1,2,3,4,5,6,7,8,9,10-DECAHYDROACRIDINE-1,8-DIONES UNDER MICROWAVE IRRADIATION WITHOUT SOLVENT

ABSTRACT A convenient synthetic method for the title compounds are described. Heating 1, 2 and 3 under microwave irradiation for 3–5 min to afford 4. The structure of the compound 4c has been thoroughly studied by X-ray crystallographic analysis.

Effective Synthesis of 7‐Amino‐6‐cyano‐5‐aryl‐5H‐pyrano[2,3‐d]pyrimidine‐2,4(1H,3H)‐diones Under Microwave Irradiation

Abstract A series of 7‐amino‐6‐cyano‐5‐aryl‐5H‐pyrano[2,3‐d]pyrimidine‐2,4(1H,3H)‐diones were synthesized by the reaction of arylidenemalononitrile with barbituric acid under microwave irradiation without catalyst with shorter reaction time and higher yields.

THE SYNTHESIS OF NOVEL SUBSTITUTED 2,5-DIOXO-1,2,3,4,5,6,7,8-OCTAHYDROQUINOLINES WITHOUT SOLVENT UNDER MICROWAVE IRRADIATION

A convenient synthetic method for substituted 2,5-dioxo-1,2,3,4,5,6,7,8-octahydroquinolines is described. Heating Meldrums acid, dimedone, ammonium acetate and different aromatic aldehydes without a solvent in a microwave irradiation for 2–5 minutes affords 4 in 72–86% yield. The structure of these compounds has been thoroughly studied by x-ray crystallographic analysis.

A Novel Reaction of Aldeoxime with Dimedone Under Microwave Irradiation

Abstract The reaction of aldeoxime with dimedone and ammonium acetate in glycol under microwave irradiation has been carried out, elimination and cyclization happened and acridine derivatives were obtained. The structure of the product has been thoroughly studied by x‐ray crystallographic analysis.

The Reaction of Aromatic Dialdehyde with Dimedone Under Microwave Irradiation

Abstract The bis‐oxanthene, bis‐polyhydroacridine, and bis‐N‐hydroxylacridine derivatives were obtained by the reaction of aromatic dialdehyde with dimedone in ethylene glycol under microwave irradiation. The reaction time was shot and the yield was high.

A synthesis of 10-aryl-2,7-dimethyl-4,5-dioxo-3,6,9- trioxa-3,4,5,6,9, 10-hexahydroanthracene catalysed by KF-alumina

A series of 10-aryl-2,7-dimethyl-4,5-dioxo-3,6,9- trioxa-3,4,5,6,9,10-hexaanthracenes were prepared by the reaction of aromatic aldehydes with triacetic acid lactone in ethylene glycol catalysed by KF-alumina.

Fast and Efficient Synthesis of 10‐Aryl‐2,7‐dimethyl‐4,5‐dioxo‐3,6,9‐trioxa‐3,4,5,6,9,10‐hexahydroanthracene under Microwave Irradiation without Catalyst

Abstract A fast and efficient synthetic method for the title compounds is described. By heating aromatic aldehyde and triacetic acid lactone in ethylene glycol under microwave irradiation without catalyst for 3–5 min, 10‐aryl‐2,7‐dimethyl‐4,5‐dioxo‐3,6,9‐trioxa‐3,4,5,6,9,10‐hexahydroanthracenes were afforded with high yields.

Synthesis of Bis‐1,4‐Dihydropyridine Derivatives

Abstract A series of bis‐1,4‐dihydropyridine derivatives were synthesized by the reaction of p‐phenylenedialdehyde or m‐phenylenedialdehyde and active methylene compounds.