102159-41-1Relevant academic research and scientific papers
Vibrational spectroscopic studies, theoretical aspects, and X-ray analysis of xanthenodiones (1,8-dioxooctahydroxanthenes)
da Silva, Milene Lopes,Teixeira, Róbson Ricardo,de Oliveira, Fabrício Marques,de Moura Guimar?es, Luciano,Martins, Felipe Terra
, p. 777 - 792 (2021)
Compounds containing a pyran moiety fused to two cyclohexen-2-one rings are collectively called xanthenodiones (1,8-dioxooctahydroxanthenes). With the aim of increasing the knowledge about the structures of xanthenodiones, in the present investigation two
A green and efficient synthesis of 9-aryl-3,4,5,6,7,9-hexahydroxanthene-1, 8-dione using a task-specific ionic liquid as dual catalyst and solvent
Ma, Jingjun,Zhou, Xin,Zang, Xiaohuan,Wang, Chun,Wang, Zhi,Li, Jingci,Li, Qing
, p. 146 - 148 (2007)
A green and efficient method for the preparation of 9-aryl-3,4,5,6,7,9- hexahydro-1H-xanthene-1,8(2H)-dione has been developed using functionalized ionic liquids as a catalyst and a reaction medium. The nature of both the counter anion and cation influenc
Facile and efficient synthesis of xanthenedione derivatives promoted by niobium pentachloride
Dos Santos, Willian H.,Da Silva-Filho, Luiz C.
, p. 1658 - 1664 (2016)
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
Alumina-sulfuric acid catalyzed eco-friendly synthesis of xanthenediones
Pramanik, Amit,Bhar, Sanjay
experimental part, p. 17 - 24 (2012/06/16)
Alumina-sulfuric acid has been developed as a cost-effective, recyclable, heterogeneous solid acid catalyst for the eco-friendly synthesis of 9-aryl-1,8-dioxododecahydroxanthenes and 9-aryl-3,3,6,6-tetramethyl-1,8- dioxooctahydroxanthenes through the cond
XANTHENEDIONE DERIVATIVES FOR THE TREATMENT OF PIGMENTATION AND SKIN AGEING DISORDERS
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Page/Page column 15-16, (2012/02/01)
The invention relates to compound of generic formula (I) in which: R1 and R2 represent: OH, a hydrogen atom, a C1-C6 alkyl radical a C1-C6 alkoxy radical, a halogen, or OCOR3; R
CsF mediated rapid condensation of 1,3-cyclohexadione with aromatic aldehydes: Comparative study of conventional heating vs. ambient temperature
Nandre, Kamalakar P.,Patil, Vijay S.,Bhosale, Sidhanath V.
experimental part, p. 777 - 780 (2012/01/03)
A mild, efficient and high yielding protocol for the synthesis of 2,2′-arylmethelene dicyclohexane-1,3-dione derivatives at room temperature and 9-aryl-1,8-dihydrooctahydroxanthene at conventional heating using cesium fluoride as a catalyst is reported. T
Envirocat EPZ-10: A solid acid catalyst for the synthesis of 1,8-dioxo-octahydroxanthenes in aqueous medium
Pore,Shaikh,Patil,Dongare,Desai
experimental part, p. 2215 - 2219 (2010/09/18)
An efficient method for synthesis of 1,8-dioxo-octahydroxanthenes using EPZ-10 as a heterogeneous catalyst is developed. In this method, aldehydes and dimedone/cyclohexane-1,3-dione are heated at 70C in the presence of a catalytic amount of EPZ-10 in wate
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
Condensation of 1,3-cyclohexanedione with aromatic aldehydes catalyzed by acidic ionic liquids
Kang, Hui,Hu, Yi,Huang, He,Wei, Ping
scheme or table, p. 223 - 227 (2009/04/14)
An efficient and convenient approach to the synthesis of 9-aryl-2, 3, 4, 5, 6, 7-hexahydro-2H-Xanthene-1, 8-dionc by condensation of 1, 3-cyclohexanedione with aromatic aldehydes catalyzed by acid ionic liquid 1-methyllimidazolium hydrogen sulphate ([Hmim
