Studies On Some Organic Synthesis Reactions Catalyzed By Surfactants In Aqueous Media

This thesis consists of two chapters. Chapter one:Progress of the organic synthesis reactions in aqueous media Since 1 980,Breslow had discovered that Diels-Alder reaction performed in water carl besubject to huge accelerations.The observation led to increased interest from synthetic organic.chemists in organic reactions in water. Chapter two:Studies on the organic synthesis reactions in aqueous media catalyzed by surfactant In the first part,an efficient and convenient approach to the synthesis of 9-aryl 一1,8-dioxo-octahydroxanthene defivmives using P-dodecylbenzenesulfonic acid(DBSA)as the catalyst(1 0 m01%)is described.This method provides several advantages such as environment friendliness,high yields and simple work-up procedure. In the second part,reaction of aromatic aldehyde,5,5-dimethyl-1,3-cyclohexanedione and P--toluidine in water were successfully carried out in the presence of P--dodecylbenzene--sulfonic acid(DBSA)as a Brdnsted acid-surfactant-combined catalyst.This method provides several advantages such as environment friendliness,high yields and simple work—up procedure. In the third part,An efficient and convenient approach to the synthesis of 9-aryl 一1,8-dioxo-octahydroxanthene derivatives using P-dodecylbenzene sulfonic acid(DBSA)as the catalyst(10 m01%)under ultrasound irradiation is described.This method provides several advantages such as environment friendliness,high yields and simple work-up procedure. In the fourth part,An efficient and convenient approach to the synthesis of the products from aldehydes and 5,5-dimethyl-1,3-cyclohexanedione using the surfactant catalyst sodium dodecyl sulfate(SDS)(10 m01%)is described.This method provides several advantages such as environment friendliness,high yields and simple work-up procedure.