Solvent-free tetrahydropyranylation of alcohols catalyzed by amine methanesulfonates
作者:Rui Wang、MingZhu Sun、Heng Jiang
DOI:10.1007/s11164-010-0222-6
日期:2011.1
A comparative study of tetrahydropyranylation of alcohols under various solvents or solvent-free conditions using different amine methanesulfonates as catalysts shows that tetrahydropyranyl ethers of alcohols are obtained under solvent-free conditions in good yields using catalytic amounts of triethylenediamine methanesulfonate, 1,6-hexanediamine methanesulfonate, diethylenetriamine methanesulfonate and pyridine methanesulfonate, respectively. The reaction occurs readily in short times at room temperature catalyzed by these catalysts, especially triethylenediamine methanesulfonate. Some of the major advantages of this procedure are that the catalysts are environmentally friendly, highly effective, and easy to prepare and handle. The reaction is also clean and needs no solvent, and the work-up is very simple.
1,6-HEXANEDIAMINE METHANESULFONATE: A MILD AND EFFICIENT CATALYST FOR THE TETRAHYDROPYRANYLATION OF ALCOHOLS UNDER SOLVENT-FREE CONDITIONS
作者:Rui Wang、Heng Jiang
DOI:10.1080/10826068.2010.488491
日期:2010.7.14
Various alcohols react with 3,4-dihydro-2 H-pyran undermildconditions using a catalytic amount of 1,6-hexanediamine methanesulfonate. It affords the corresponding tetrahydropyranyl ethers in good yields at a faster rate in the absence of solvent.
Copper nitrate/acetic acid as an efficient synergistic catalytic system for the chemoselective tetrahydropyranylation of alcohols and phenols
作者:Min Wang、Zhi-Guo Song、Hong Gong、Heng Jiang
DOI:10.1007/s00706-008-0051-0
日期:2009.2
ylation of alcohols and phenols was accomplished successfully using copper nitrate and acetic acid as a synergistic catalyst at room temperature under solvent-free condition. Compared with other synergistic catalytic systems, copper nitrate/acetic acid proved to be the most efficient. Both alcohols (primary, secondary, tertiary, benzylic, cyclic, allyl, cinnamyl, and furyl) and phenols reacted smoothly
Tetrahydropyranylation of Alcohols and Phenols Using the Synergistic Catalyst System, Copper(II) Chloride-Acetic Acid
作者:Min Wang、Zhi-Guo Song、Heng Jiang、Hong Gong
DOI:10.1007/s00706-007-0631-4
日期:2007.6
Copper(II) chloride-acetic acid was found to be an efficient synergistic catalytic system for the tetraphydropyranylation of various alcohols and phenols in high yields at room temperature in short reaction times.
A method of determining whether an individual is infected with a mycobacterial disease, the method comprising: (a) providing a system which comprises an antigen; (b) contacting the system with a sample obtained from the individual; and (c) detecting the presence or absence of binding of a biomarker in the sample with the antigen; wherein the antigen is a mycolic acid wax ester derived antigen.