Mechanism of Hydrocarbon Functionalization by an Iodate/Chloride System: The Role of Ester Protection
作者:Nichole A. Schwartz、Nicholas C. Boaz、Steven E. Kalman、Thompson Zhuang、Jonathan M. Goldberg、Ross Fu、Robert J. Nielsen、William A. Goddard、John T. Groves、T. Brent Gunnoe
DOI:10.1021/acscatal.7b04397
日期:2018.4.6
achieve >20% yield of methyl trifluoroacetate (TFA) from methane with >85% selectivity. The mechanism of this C–H oxygenation has been probed by examining adamantane as a model substrate. These recent results lend support to the involvement of freeradicals. Comparative studies between radical chlorination and iodate/chloride functionalization of adamantane afford statistically identical 3°:2° selectivities
用于轻链烷烃氧化的氯化物和碘酸盐的混合物可从甲烷中获得> 20%的三氟乙酸甲酯(TFA)收率,且具有> 85%的选择性。通过检测金刚烷作为模型底物,已经探究了这种CHH氧化的机理。这些最新结果为自由基的参与提供了支持。自由基氯化和金刚烷碘酸盐/氯化物官能化之间的比较研究提供了统计上相同的3°:2°选择性(〜5.2:1)和C–H / C–D功能化的动力学同位素效应(k H / k D = 1.6(3 ),1.52(3))。HTFA中碘酸盐/氯化物对烷烃的官能化被认为是通过自由基原子(包括Cl •产生烷基。通过碘酸盐原位还原形成的碘将烷基自由基捕获为烷基自由基,随后在HTFA溶剂中将其转化为烷基酯。重要的是,由于酯部分的保护性质,烷基酯产物(RTFA)对于在氧化条件下的进一步氧化是相当稳定的。
Partial oxidation of light alkanes by periodate and chloride salts
作者:Steven E. Kalman、Dominik Munz、George C. Fortman、Nicholas C. Boaz、John T. Groves、T. Brent Gunnoe
DOI:10.1039/c5dt00558b
日期:——
The efficient and selective partial oxidation of light alkanes using potassium periodate and potassium chloride is reported.
报道了使用高碘酸钾和氯化钾对轻烷烃进行高效选择性部分氧化的研究。
METHOD FOR PRODUCING TETRAFLUORO COMPOUND
申请人:Miyashita Yasuhiro
公开号:US20110178323A1
公开(公告)日:2011-07-21
Provided is a method for producing a tetrafluoro nitrogen-containing heterocyclic compound such as tetrafluoropyrrolidine in good yield and at low cost. The method comprises the steps of: (A) reacting a compound represented by the formula (I) with fluorine gas to produce a tetrafluoro compound represented by the formula (II),
(B) converting the tetrafluoro derivative represented by the formula (II) to a compound represented by the formula (III), and
(C) reacting the compound represented by the formula (III) with an amine compound represented by the formula NH
2
R
9
to produce a tetrafluoro nitrogen-containing heterocyclic compound represented by the formula (IV) or salt thereof.
Main-Group Compounds Selectively Oxidize Mixtures of Methane, Ethane, and Propane to Alcohol Esters
作者:Brian G. Hashiguchi、Michael M. Konnick、Steven M. Bischof、Samantha J. Gustafson、Deepa Devarajan、Niles Gunsalus、Daniel H. Ess、Roy A. Periana
DOI:10.1126/science.1249357
日期:2014.3.14
dependence on petroleum for industrial feedstocks. Lead and thalliumsalts are surprisingly selective and efficient oxidants of the constituents of natural gas. Much of the recent research on homogeneous alkane oxidation has focused on the use of transition metal catalysts. Here, we report that the electrophilic main-group cations thallium(III) and lead(IV) stoichiometrically oxidize methane, ethane
Oxidation of ethane and propane with cobalt(<scp>II</scp>) catalyst: unexpected formation of 1,2-diol esters and C–C bond cleavage
作者:Igor P. Stolarov、Michael N. Vargaftik、Dmitry I. Shishkin、Ilya I. Moiseev
DOI:10.1039/c39910000938
日期:——
Ethane reacts with both cobalt(III) and O2âcobalt(II) in trifluoroacetic acid solution to form ethyl trifluoroacetate and 1,2-bistrifluoroacetoxyethane in successive reactions, along with the products of CâC bond cleavage; propane undergoes similar oxidative reactions.