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    ENANTIOSELECTIVE CYCLOPROPENATION OF ALKYNES
    2.
    发明申请
    ENANTIOSELECTIVE CYCLOPROPENATION OF ALKYNES 审中-公开
    烷基的选择性环丙基

    公开(公告)号：US20130030170A1

    公开(公告)日：2013-01-31

    申请号：US13364570

    申请日：2012-02-02

    申请人： X. Peter Zhang ,  Xin Cui

    发明人： X. Peter Zhang ,  Xin Cui

    IPC分类号： C07C253/30 ,  C07D487/22 ,  C07C1/20 ,  C07C1/32 ,  C07C5/44 ,  C07C1/26

    CPC分类号： C07C255/46 ,  C07C317/44 ,  C07C323/61 ,  C07C2601/02 ,  C07C2601/16 ,  C07D487/22

    摘要： The cobalt(II) complex of new D2-symmetric chiral porphyrin 3,5-DiMes-ChenPhyrin, [Co(P2)], has been shown to be a highly effective chiral metalloradical catalyst for enantioselective cyclopropenation of alkynes with acceptor/acceptor-substituted diazo reagents such as α-cyanodiazoacetamides and α-cyanodiazoacetates. The [Co(P2)]-mediated metalloradical cyclopropenation is suitable to a wide range of terminal aromatic and related conjugated alkynes with varied steric and electronic properties, providing the corresponding tri-substituted cyclopropenes in high yields with excellent enantiocontrol of the all-carbon quaternary stereogenic centers. In addition to mild reaction conditions, the Co(II)-based metalloradical catalysis for cyclopropenation features a high degree of functional group tolerance.

    摘要翻译： 新型D2对称手性卟啉3,5-DiMes-ChenPhyrin [Co（P2）]的钴（II）配合物已被证明是一种高效的手性金相催化剂，用于对炔诺酮与对映体/受体取代的对映选择性环丙化 重氮试剂如α-氰基二异氰酸乙酰胺和α-氰基二异氰酸酯。 [Co（P2）]介导的金属偶联环化适用于具有不同空间和电子性质的多种末端芳族和相关的共轭炔，以高产率提供相应的三取代环丙烯，具有优异的全碳季铵化对映体 立体中心。 除了温和的反应条件外，用于环丙烯化的Co（II）基金属离子催化具有高度的官能团耐受性。

    Dehydrogenation process
    3.
    发明授权
    Dehydrogenation process 失效

    公开(公告)号：US3920764A

    公开(公告)日：1975-11-18

    申请号：US18939171

    申请日：1971-10-14

    申请人： LUMMUS CO

    发明人： RIEGEL HERBERT ,  SCHINDLER HARVEY D ,  SZE MORGAN C ,  BROOKS MAURICE E

    IPC分类号： C07C5/44 ,  C07C3/00

    CPC分类号： C07C5/44 ,  Y10S585/90 ,  Y10S585/912 ,  C07C15/46

    摘要： Process for dehydrogenating a feed containing either an alkane, cycloalkane, mono-halo substituted derivative thereof or alkyl substituted aromatic hydrocarbon wherein the feed is contacted with a melt containing a multivalent metal halide in both its higher and lower valence state, such as a mixture of cupric and cuprous chloride. In accordance with a preferred embodiment, the melt is previously contacted with an oxygen containing gas to produce the corresponding oxyhalide of the metal, whereby the reaction may be effected on a continuous basis.

    Dehydrogenation process
    4.
    发明授权
    Dehydrogenation process 失效
    脱氢方法

    公开(公告)号：US3776967A

    公开(公告)日：1973-12-04

    申请号：US3776967D

    申请日：1971-10-14

    申请人： LUMMUS CO

    发明人： RIEGEL H ,  SCHINDLER H ,  SZE M ,  BROOKS M

    IPC分类号： C07C5/333 ,  C07C5/44 ,  C07C5/20

    CPC分类号： C07C5/333 ,  C07C5/44 ,  C07C13/20 ,  C07C13/275 ,  C07C13/00

    摘要： PROCESS FOR DEHYDROGENATING A FEED CONTAINING EITHER AN ALKANE, CYCLOALKANE, MONO-HALO SUBSTITUTED DERIVATIVE THEREOF OR ALKYL SUBSTITUTED ARMOATIC HYDROCARBON WHEREIN THE FEED IS CONTACTED WITH A MELT CONTAINING A MULTIVALENT METAL HALIDE IN BOTH ITS HIGHER AND LOWER VALENCE STATE, SUCH AS A MIXTURE OF CUPRIC AND CUPROUS CHLORIDE, IN ACCORDANCE WITH A PREFERRED EMBODIMENT, THE MELT IS PREVIOUSLY CONTACTED WITH AN OXYGEN CONTAINING GAS TO PRODUCE THE CORRESPONDING OXYHALIDE OF THE METAL, WHEREBY THE REACTION MAY BE EFFECTED ON A CONTINUOUS BASIS.

    Ethylene from ethane and halogen through fluidized rare earth catalyst
    6.
    发明授权
    Ethylene from ethane and halogen through fluidized rare earth catalyst 失效
    乙烯和乙醇通过流化稀土催化剂

    公开(公告)号：US3658934A

    公开(公告)日：1972-04-25

    申请号：US3658934D

    申请日：1969-07-14

    申请人： ETHYL CORP

    发明人： BEARD WILLIAM Q JR

    IPC分类号： C07C5/44 ,  C07C3/28 ,  C07C5/18

    CPC分类号： C07C5/44 ,  C07C11/04

    摘要： PROCESS FOR THE PREPARATION OF VINYL HALIDE BY HALODEHYDROGENATION OF EHTANE TO ETHYLENE IN THE PRESENCE OF AN INERT DILUENT, OXYHALOGENATION OF THE ETHYLENE TO 1,2-DI HALOETHANE, DEHYDROHALOGENATION OF THE 1,2-DIHALOETHANE TO VINYL HALIDE, AND RECYCLE OF PART OR ALL OF EITHER OR BOTH ETHANE AND HYDROGEN HALIDE FROM THE VINLY HALIDE STEP TO THE HALODEHYDROGENATION AND OXYHALOGENATION STEPS, RESPECTIVELY. A PREFERRED CATALYST FOR THE HALODEHYDROGENATION STEP INCLUDES A LOW CONCENTRATION OF COPPER OR IRON HALIDE WITH RARE EARTH HALIDE, THE RATIO OF RARE EARTH HALIDE TO COPPER OR IRON BEING GREATER THAN 1:1. OTHER PREFERRED CATALYST COMPONENTS INCLUDE ALKALI METAL HALIDE AND MANGANESE HALIDE.