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    Cyclopentadiene fuels
    2.
    发明授权
    Cyclopentadiene fuels 有权

    公开(公告)号：US11078139B1

    公开(公告)日：2021-08-03

    申请号：US16559778

    申请日：2019-09-04

    申请人： The United States of America as Represented by the Secretary of the Navy

    发明人： Benjamin G. Harvey

    IPC分类号： C07C29/145 ,  C07C1/24 ,  C07C2/52 ,  C07C45/59 ,  C07C5/22 ,  C07C45/66 ,  C07C51/36 ,  C07C67/08 ,  C07C45/41 ,  C07C51/42 ,  C07C45/61 ,  C07C7/04

    摘要： A method for making cyclopentadiene fuels comprising producing cyclopent-2-en-1-one or a mixture of cyclopent-2-en-1-one from a bio-based source. The cyclopent-2-en-1-one or the mixture of cyclopent-2-en-1-one is hydrogenated, thereby forming cyclopent-2-en-1-ol or a mixture of cyclopent-2-en-1-ol. The cyclopent-2-en-1-ol or the mixture of cyclopent-2-en-1-ol is dehydrated with a dehydrating agent, thereby forming cyclopentadiene or a mixture of cyclopentadiene. The cyclopentadiene or mixture of cyclopentadiene is converted to dicyclopentadiene or dihydrodicyclopentadiene. The dicyclopentadiene or dihydrodicyclopentadiene is hydrogenated, thereby forming tetrahydrodicyclopentadiene. The tetrahydrodicyclopentadiene is isomerized, thereby forming exo-tetrahydrodicyclopentadiene.

    SYNTHESIS AND USE OF OXA-SPIRODIPHOSPHINE LIGAND
    5.
    发明申请
    SYNTHESIS AND USE OF OXA-SPIRODIPHOSPHINE LIGAND 审中-公开

    公开(公告)号：US20200308206A1

    公开(公告)日：2020-10-01

    申请号：US16770087

    申请日：2018-02-08

    申请人： SHENZHEN CATALYS SCIENCE AND TECHNOLOGY CO., LTD.

    发明人： Xumu ZHANG ,  Genqiang CHEN ,  Jiaming HUANG

    IPC分类号： C07F15/00 ,  C07F9/6561 ,  C07C51/36 ,  B01J31/22 ,  B01J31/24

    摘要： The present invention relates to the technical field of chiral synthesis, and specifically provides a new type of oxa-spirodiphosphine ligands. The bisphosphine ligand is prepared with oxa-spirobisphenol as a starting material after triflation, palladium catalyzed coupling with diaryl phosphine oxide, reduction of trichlorosilane, further palladium catalyzed coupling with diaryl phosphine oxide, and further reduction of trichlorosilane. The oxa-spiro compound has central chirality, and thus includes L-oxa-spirodiphosphine ligand and R-oxa-spirodiphosphine ligand. The racemic spirodiphosphine ligand is capable of being synthesized from racemic oxa-spirobisphenol as a raw material. The present invention can be used as a chiral ligand in the asymmetric hydrogenation of unsaturated carboxylic adds. The complex of the ligand with ruthenium can achieve an enantioselectivity of greater than 99% in the asymmetric hydrogenation of methyl-cinnamic acid.

    Fluorination of acrylate esters and derivatives
    7.
    发明授权
    Fluorination of acrylate esters and derivatives 有权

    公开(公告)号：US10584089B2

    公开(公告)日：2020-03-10

    申请号：US16199967

    申请日：2018-11-26

    申请人： Vifor (International) Ltd.

    发明人： YongQi Mu

    IPC分类号： C07C51/36 ,  C07C51/50 ,  C07C51/62 ,  C07C51/64 ,  C07C51/363 ,  C07C67/03 ,  C07C67/22 ,  C07C67/62 ,  C07C67/307 ,  C07C253/30 ,  C07C253/32

    摘要： The present invention generally relates to processes for converting acrylate esters or a derivative thereof to difluoropropionic acid or a derivative thereof. This process is generally performed using fluorine gas in a hydrofluorocarbon solvent. In particular, a process for fluorinating a double bond is disclosed. This process comprises forming a reaction mixture comprising a hydrofluorocarbon solvent, fluorine gas, and a compound of formula 1 wherein R1 is hydroxy, alkoxy, chloro, or —OC(O)CH═CH2 to form a compound of formula 2 in a yield of at least 50% wherein R2 is hydroxy, alkoxy, chloro, —OC(O)CHFCH2F, wherein the hydrofluorocarbon solvent comprises 2H,3H-decafluoropentane and the reaction mixture further comprises a fluorination agent.