Light promoted synthesis of 1,8-dioxooctahydroxanthenes using sulphated tin oxide as solid support catalyst
الموضوعات : International Journal of Heterocyclic Chemistry
Tabassum Siddiqui
1
(School of Chemical Sciences Swami Ramanand Teerth Marathwada University Nanded 431606 MS India)
Pramod Kulkarni
2
(Department of Chemistry Hutatma Rajguru Mahavidyalaya Rajgurunagar, Pune 410505 MS India)
Pudukulatham Zubaidha
3
(School of Chemical Sciences Swami Ramanand Teerth Marathwada University Nanded 431606 MS India)
الکلمات المفتاحية:
ملخص المقالة :
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 heterocycle in which a phenyl substituted pyran ring is fused on either side with two cyclohexanone rings and this unit constitutes in a number of natural products with wide range of therapeutic and pharmacological properties. The present paper describes house hold 100 watt bulb promoted multicomponent reaction between dimedone and various substituted cinnamaldehydes/ substituted benzaldehydes to afford the corresponding 1,8-dioxo-octahydroxanthene derivatives using sulphated tinoxide as solid supported catalyst. This green procedure using heterogenous catalyst and light as source of energy provides facile access to a variety of 1,8-dioxo- octahydroxanthene derivatives in good to excellent yield.
