28659-20-3Relevant academic research and scientific papers
Acid-washed bentonite: A new reagent for the deprotection of tetrahydropyranyl ethers
Poon, Po.S.,Banerjee, Ajoy K.,Bedoya, Liadis,Sanchez, Jennifer,Laya, Manuel S.
, p. 477 - 479 (2011)
Acid-washed (pH 4 and pH 6) bentonite earth cleaves the tetrahydropyranyl ethers to the corresponding alcohols in good yield under mild conditions.
Solvent-free acetylation and tetrahydropyranylation of alcohols catalyzed by recyclable sulfonated ordered nanostructured carbon
Zareyee, Daryoush,Alizadeh, Parastoo,Ghandali, Mohammad S.,Khalilzadeh, Mohammad A.
, p. 713 - 721 (2013/07/26)
Rapid and practical green acetylation and tetrahydropyranylation routes of structurally diverse alcohols and phenols were applied under solvent-free reaction conditions providing excellent yields, using catalytic amounts of environmentally friendly sulfonated ordered nanoporous carbon (CMK-5-SO 3H). Non-toxic nature of the catalyst, its easy handling, recovery and reusability, and the absence of any solvent characterize the presented procedures as efficient methods. These procedures provide methods for the separation of the product by simple filtration.
Dowex 50WX4-100: An efficient catalyst for the tetrahydropyranylation of alcohols
Poon,Banerjee, Ajoy K.,Bedoya, Liadis,Laya, Manuel S.,Cabrera, Elvia V.,Albornoz, Karla M.
experimental part, p. 3369 - 3377 (2011/03/19)
The ion-exchange resin Dowex 50WX4-100 has been found to catalyze efficiently the protection reaction of a variety of alcohols with 2,3-dihydro-4H pyran (DHP) and dichloromethane at ambient conditions. Copyright Taylor & Francis Group, LLC.
TRIAZOLE DERIVATIVES USEFUL AS AXL INHIBITORS
-
Page/Page column 146, (2010/11/26)
Triazole derivatives and pharmaceutical compositions containing the derivatives are disclosed as being useful in inhibiting the activity of the receptor protein tyrosine kinase Axl. Methods of using the derivatives in treating diseases or conditions associated with Axl catalytic activity are also disclosed.
Zeolite-catalyzed environmentally friendly tetrahydropyranylation of alcohols and phenols
Hegedues, Adrienn,Vigh, Ilona,Hell, Zoltan
, p. 4145 - 4152 (2007/10/03)
A simple and environmentally friendly tetrahydropyranylation of various alcohols and phenols at room temperature was elaborated by using a small pore size zeolite. The material is also suitable for the deprotection but with less efficiency.
A facile synthesis of benzofuran derivatives: A useful synthon for preparation of trypsin inhibitor
Sekizaki, Haruo,Itoh, Kunihiko,Toyota, Eiko,Tanizawa, Kazutaka
, p. 237 - 243 (2007/10/03)
Mono-substituted 2-methylbenzo[b]furans were prepared by Claisen rearrangement of corresponding allyl phenyl ethers and subsequent bis(benzonitrile)palladium(II) chloride-mediated cyclization of o-allylphenols.
Z-isomers of 3,3'-disubstituted azobenzenes highly compatible with liquid crystals
Ruslim, Christian,Ichimura, Kunihiro
, p. 673 - 681 (2007/10/03)
It is known that mesophase changes can be induced by E-Z photoisomerization of azobenzenes doped in liquid crystals. Novel azobenzenes have been designed on the basis of Molecular Mechanics and Molecular Orbital calculation, aimed at exploiting novel photoresponsive guest-host liquid crystalline systems exhibiting no mesophase change despite the drastic structural alteration of the guest molecules. It was found that the introduction of alkanoyloxy groups at both the 3- and 3'-positions of azobenzene leads to phase stability of nematic systems upon the E-Z photoisomerization even at a dopant concentration as high as 20 wt%. However phase separation was brought about when 3,3'-dialkoxyazobenzenes and 4,4'- dialkoxyazobenzenes were employed as guest molecules. The relation between the conformational structures of the guests in their E- and Z-isomers and their compatibility with nematic hosts was examined thermodynamically. Experimental results were compared in some details with the simulations. It was shown that 3,3'-dialkanoyloxyazobenzene prefers a rod-like structure in both E- and Z-isomers.
Z-isomers of azobenzenes highly compatible with liquid crystals
Ruslim, Christian,Ichimura, Kunihiro
, p. 789 - 790 (2007/10/03)
Novel guest-host liquid crystal systems containing 3,3-disubstituted azobenzenes as guests were prepared on the basis of molecular design by molecular calculations to achieve the improvement of compatibility of the chromophore with nematic phases. No phase change of nematic liquid crystals was induced by the E-to-Z photoisomerization of the guests even at doped concentrations as high as 20 wt%.
