CHLOROSULFONATION OF 9-ARYLOCTAHYDROXANTHEN-1,8-DIONES
摘要:
The 9-aryloctathydroxanthen-1,8-diones (3, 4-24) were prepared by reaction of cyclohexan-1,3-dione (1) with selected arylaldehydes. The xanthendiones (4-9, 11, 12, 18, 21, 22) were successfully reacted with chlorosulfonic acid, and the crude sulfonyl chlorides were converted into 15 sulfonamides (26-40) for screening as potential pesticides. Attempted chlorosulfonation of the xanthendiones (13-17) was unsuccessful. alpha-Methylcinnamaldehyde was reacted with cyclohexandione (1) to yield the corresponding xanthendione derivative (23). On the other hand, with o-methoxycinnamaldehyde an impure product formed and the p-methoxy isomer afforded the corresponding 2-arylpyran (25). The NMR spectral data of the compounds are briefly discussed.
CHLOROSULFONATION OF 9-ARYLOCTAHYDROXANTHEN-1,8-DIONES
摘要:
The 9-aryloctathydroxanthen-1,8-diones (3, 4-24) were prepared by reaction of cyclohexan-1,3-dione (1) with selected arylaldehydes. The xanthendiones (4-9, 11, 12, 18, 21, 22) were successfully reacted with chlorosulfonic acid, and the crude sulfonyl chlorides were converted into 15 sulfonamides (26-40) for screening as potential pesticides. Attempted chlorosulfonation of the xanthendiones (13-17) was unsuccessful. alpha-Methylcinnamaldehyde was reacted with cyclohexandione (1) to yield the corresponding xanthendione derivative (23). On the other hand, with o-methoxycinnamaldehyde an impure product formed and the p-methoxy isomer afforded the corresponding 2-arylpyran (25). The NMR spectral data of the compounds are briefly discussed.
Microwave-assisted clean synthesis of xanthenes and chromenes in [bmim][PF6] and their antioxidant studies
作者:P. Iniyavan、S. Sarveswari、V. Vijayakumar
DOI:10.1007/s11164-014-1821-4
日期:2015.10
An efficientone-potsynthesis of xanthene and chromene derivatives by three-component reactions of aryl aldehydes, cyclic 1,3-diketones, and 2-naphthol/4-hydroxy coumarin catalyzed by ionicliquid (IL) [bmim][PF6] undermicrowaveirradiation is described. The present scheme provides several advantages such as short reaction time, mild reaction conditions, good yields, convenient operation, and reuse
Facile and efficient synthesis of xanthenedione derivatives promoted by niobium pentachloride
作者:Willian H. dos Santos、Luiz C. Da Silva-Filho
DOI:10.1515/chempap-2016-0098
日期:2016.1.1
Xanthenedionederivatives were synthesised in one-pot reactions between arylaldehyde derivatives and 1,3-cyclohexanedione promoted by niobium pentachloride. This new method is simple, costeffective, high-yielding with a good variety of substrates generality, and can be conducted within reasonable reaction times.