CAS: 496-78-6; 2,4,5-Trimethylphenol

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1,2,4-三甲基苯置于高氯酸,(Tetra-N-Butylammonium)4[gamma-Hpv2W10O40],双氧水体系中,用 乙腈,叔丁醇 作为反应溶剂,化学反应生成 2,4,5-三甲酚
参考文献:理解芳烃羟基取代在钒取代的γ-Keggin聚氧钨酸盐上的区域选择性
标题:理解芳烃羟基取代在钒取代的γ-Keggin聚氧钨酸盐上的区域选择性
摘要:假枯(pc)用含水氢的芳香族羟基化过氧化物由二钒取代的γ-的keggin Polyoxotungstate Tba催化的4 [γ-Pw 10 ö 38 V 2(μ-O)(μ-Oh)](tba-1H,Tba =四丁基铵)已使用动力学建模和dft计算进行了研究.该反应具有很高的化学选择性和异常的区域选择性,提供了2,4,5-三甲基苯酚(tmp)作为主要产物.然后将计算研究扩展到对其他烷氧基和烷基芳烃底物的区域选择性的分析.用31研究了mecn / T Buoh(1:1)中tba-1H的质子化/去质子化1 H NMR光谱.用不同的质子化状态,[γ-Pv形式2 W ^ 10 ö 40] 5-(1),[γ-Hpv 2 W ^ 10 ö 40] 4-(1H),和[γ-H 2 Pv 2 W ^ 10 ô 40] 3-(1H 2),已经确定,并且质子平衡常数是根据31 P NMR数据估算的.df
DOI:10.1021/acscatal.7B02694

专利信息

专利号:WO-0112791-A1
优先权日:1999-08-12
标 题 :Dna shuffling of dioxygenase genes for production of industrial chemicals
发明人：SELIFONOV SERGEY A; NEWMAN LISA M
权利人:MAXYGEN INC; SELIFONOV SERGEY A; NEWMAN LISA M
摘要:This invention provides improved polypeptides, including dioxygenases, dehydrogenases, ligases and transferases that are useful for the biocatalytic synthesis of compounds such as α-hydroxycarboxylic acids, and aryl- and alkyl-hydroxy and carboxylic acid compounds. The polypeptides provided herein are improved in properties such as regioselectivity, enzymatic activity, stereospecificity, and the like. Methods for obtaining recombinant polynucleotides that encode these improved polypeptides are also provided, as are organisms that express the polypeptides and are thus useful for carrying out said biocatalytic syntheses. Also provided by the invention are methods for increasing said solvent resistance of organisms that are used in the synthetic methods.

专利号:US-3994982-A
优先权日:1975-08-25
标 题:Process for direct methylation of phenol in liquid phase
发明人：LEACH BRUCE L
权利人:CONTINENTAL OIL CO
摘要:Phenol is directly methylated in liquid phase while in the presence of gamma aluminas derived from Ziegler alcohol synthesis. The reaction is carried out continuously in liquid phase at temperatures of from about 300 DEG to 400 DEG C, liquid hourly space velocities of from about 1.0 to 15.0, pressures of from 500 to 1500 pounds per square inch gauge and a methylating agent to phenol mol ratio of from about .1 to about 3.0. High selectivity and yield of desired products such as ortho cresol, 2,6-xylenol and 2,3,6-trimethylphenol is obtained, while minimizing m,p cresol formation.

专利号:US-4033982-A
优先权日:1974-10-16
标 题 :3,4,5-Trithiapolycyclo compounds and derivatives
发明人：HAY ALLAN S
权利人:GEN ELECTRIC
摘要:A process for the preparation of 3,4,5-trithiapolycyclo compounds is described which comprises the reaction of sulfur with bicyclo[2.2.1]hept-2-ene compounds carried out in the presence of (1) a phenol, and (2) a base. The process can be carried out either in the absence or presence of an inert organic solvent. The trithiapolycyclic compounds produced by this process are useful as monomers in the synthesis of polymers which can be employed as additives for lubricants, to produce effective coatings on solid substrates, or to produce fibers and films.

专利号:US-7674934-B2
优先权日:2004-08-05
标题:Stabilizers for use in NVP synthesis
发明人：HOEFER FRANK; BRAND ALEXANDRA; BOETTCHER ARND; BAUMANN KATRIN; VOGELSANG REGINA
权利人:BASF AG
摘要:A process for preparing N-alkenyl compounds by reacting the corresponding NH compounds with alkynes in the liquid phase in the presence of a catalyst, wherein the reaction is carried out in the presence of at least one stabilizer, and the use of stabilizers for increasing the selectivity in a process for preparing N-alkenyl compounds by reacting the corresponding NH compounds with alkynes in the liquid phase in the presence of a catalyst.

专利号:US-3720697-A
优先权日:1971-03-01
标题 :Preparation of ortho-substituted aryl phosphines and metal complexes
发明人：FENTON D
权利人:UNION OIL CO
摘要:A METHOD IS DESCRIBED FOR THE PREPARATION OF MONOCYCLIC ARYL COMPOUNDS OF TRIVALENT GROUP V-A ELEMENTS WHEREIN THE ARYL SUBSTITUENT IS SUBSTITUTED IN ITS ORTHO POSITION WITH A HALOGEN, ALKYL, ARYLOXY OR ALJYLOXY SUBSTITUENT. THE RESULTANT COMPOUND IS USEFUL AS A LIGAND IN THE PREPARATION OF METAL COMPLEXES, SUCH AS COMPLEXES OF PALLADIUM AND PLATINUM, WHICH ARE CATALYSTS FOR HYDROCARBON CONVERSIONS SUCH AS OXIDATIONS OR HYROFORMYLATIONS. THE METHOD FOR THE ORTHO SUBSTITUTION OF THE AROMATIC COMPOUNDS COMPRISES THE REACTION OF A PALLADIUM OR PLATINUM CHELATE OF THE AROMATIC COMPOUND WITH SUBSTITUTING AGENYS SUCH AS HALOGEN OR HALIDE FOR THE HALOGENSUBSTITUTED, AN ALKYL HALID FOR THE ALKYL-SUBSTITUTED, OR AN ALKYL OR ARYK ORTHOFORMATE ESTER FOR THE ALKOLY OR ARYLOCYSUBSTITUTED COMPOUND. SUITABLE CHELATES FOR REACTION IN THIS METHOD OF SYNTHESIS ARE DISCLOSED IN MY APPLICATION, SER. NO. 873,641. FILED NOV. 3, 1969, NOW PAT. NO. 3,622,607.

专利号:CA-1143749-A
优先权日:1980-01-28
标 题 :Process for the synthesis of 2, 6-xylenol and 2,3,6-trimethylphenol