The paper describes synthesis of tetracyclic linear pyranoxanthones using 3-hydroxyxanthene as a synthon. Its transformation into only linear pyranoxathene followed by oxidation either by CAN or SeO2 provided the desired system, 1, 2, and 3 in fairly good yield.
represent a class of naturally occurring compounds with valuable and promising reported pharmacological activities. One of the main disadvantages in the use of such products is related to the difficulties in their chemical synthesis. In this Letter a new and improved method for the chemical synthesis of xanthones is described. The title compounds have been synthesized in good yields under microwave irradiation
Kondedeshmukah, R. S.; Paradkar, M. V., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1993, vol. 32, # 11, p. 1159 - 1161
作者:Kondedeshmukah, R. S.、Paradkar, M. V.
DOI:——
日期:——
Synthesis of Linear Pyranoxanthones
作者:R. S. Kondedeshmukh、M. V. Paradkar
DOI:10.1080/00397919408012642
日期:1994.3
The paper describes synthesis of tetracyclic linear pyranoxanthones using 3-hydroxyxanthene as a synthon. Its transformation into only linear pyranoxathene followed by oxidation either by CAN or SeO2 provided the desired system, 1, 2, and 3 in fairly good yield.