343349-63-3Relevant academic research and scientific papers
Facile and efficient synthesis of xanthenedione derivatives promoted by niobium pentachloride
Dos Santos, Willian H.,Da Silva-Filho, Luiz C.
, p. 1658 - 1664 (2016/10/11)
Xanthenedione derivatives were synthesised in one-pot reactions between arylaldehyde derivatives and 1, 3-cyclohexanedione promoted by niobium pentachloride. This new method is simple, cost-effective, high-yielding with a good variety of substrates genera
Bi-SO3H functionalized ionic liquid based on DABCO as a mild and efficient catalyst for the synthesis of 1,8-dioxo-octahydro-xanthene and 5-arylmethylene-pyrimidine-2,4,6-trione derivatives
Shirini, Farhad,Langarudi, Mohaddeseh Safarpoor Nikoo,Seddighi, Mohadeseh,Jolodar, Omid Goli
, p. 8483 - 8497 (2015/01/30)
1,8-Dioxo-octahydro-xanthenes are easily prepared via the condensation of aldehydes with 1,3-cyclohexadione and/or dimedone using N-sulfonated DABCO as a new and efficient catalyst. This reagent is also efficiently able to catalyze the condensation of aldehydes with barbituric acid leading to 5-arylmethylene-pyrimidine-2,4,6-triones. The structure of the products was characterized by their IR, 1H NMR, and 13C NMR spectroscopy. The present methodology offers several advantages such as ease of preparation and handling of the catalyst, high yields, simple and green procedure, low cost, short reaction times, easy work-up, and preformation of the reaction in the absence of solvent or in water as a green solvent.
A novel polymeric catalyst for the one-pot synthesis of xanthene derivatives under solvent-free conditions
Maleki, Behrooz,Barzegar, Shahram,Sepehr, Zeinalabedin,Kermanian, Mina,Tayebee, Reza
, p. 757 - 765 (2013/02/22)
A simple, efficient, and environmentally benign route was developed for the preparation of 14-aryl or alkyl- 14H-dibenzo[a,j]xanthene, 1,8-dioxo- octahydroxanthene and 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthene-11-ones from condensation of various aldeh
Glycerol as a promoting medium for electrophilic activation of aldehydes: Catalyst-free synthesis of di(indolyl)methanes, xanthene-1,8(2H)-diones and 1-oxo-hexahydroxanthenes
He, Fei,Li, Peng,Gu, Yanlong,Li, Guangxing
experimental part, p. 1767 - 1773 (2011/02/27)
Glycerol was used, for the first time, as a green and effective promoting medium for electrophilic activation of aldehydes, and with which, a catalyst-free system for some reactions that conventionally carried out using acid catalysts, such as synthesis o
Chlorosulfonation of 9-aryloctahydroxanthen-1,8-diones
Cremlyn, Richard J.,Shabbir, Ghulam
, p. 2635 - 2643 (2007/10/03)
The 9-aryloctahydroxanthen-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. α-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.
