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    Process for making substituted crotonates
    1.
    发明授权
    Process for making substituted crotonates 失效
    制备替代品的方法

    公开(公告)号：US3639445A

    公开(公告)日：1972-02-01

    申请号：US3639445D

    申请日：1968-01-08

    申请人： DOW CHEMICAL CO

    发明人： PAWLOSKI CHESTER E

    IPC分类号： C07C69/734 ,  C07C69/66

    CPC分类号： C07C69/734

    摘要： ESTERS OF CROTONIC ACID HAVING AN ETHER SUBSTITUENT IN THE 3-POSITIONS ARE PREPARED BY REACTING AN ACETOACETIC ESTER WITH AN ACETAL UNDER ACID ESTERIFICATION CONDITIONS WHEREBY LOW BOILING REACTION BY PRODUCTS ARE DISTILLED FROM THE REACTION MIXTURE SUBSTANTIALLY AS THEY ARE FORMED.

    Process for preparing 1,4-substituted-1,3-butadiynes
    3.
    发明授权
    Process for preparing 1,4-substituted-1,3-butadiynes 失效
    制备1,4-取代-1,3-丁二烯的方法

    公开(公告)号：US3557237A

    公开(公告)日：1971-01-19

    申请号：US3557237D

    申请日：1968-07-31

    申请人： DOW CHEMICAL CO

    发明人： PAWLOSKI CHESTER E

    IPC分类号： C07C1/26 ,  C07C11/22 ,  C07C11/28

    CPC分类号： C07C1/26 ,  C07C2527/08 ,  C07C2527/122 ,  C07C11/22

    摘要： 1,4-SUBSTITUTED-1,3-BUTADIYNES HAVING THE FORMULA

    R-C$C-C$C-R

    ARE MADE BY A PROCESS COMPRISING COUPLING COMPOUNDS HAVING THE FORMULA

    BR-C$C-R

    WHERE EACH R INDEPENDENTLY IS ALKYL, ALKOXYALKYL, PHENYL, PHENOXYALKYL OR PHENALKOXYALKYL IN THE PRESENCE OF A CATALYTIC SOLUTION COMPRISING AN AQUEOUS SOLUTION OF CUBR AND A NON-METALLIC SOURCE OF CHLORIDE OR BROMIDE IONS. THESE 1,4-SUTSTITUTED-1,3-BUTADIYNES ARE USEFUL AS CHEMICAL INTERMEDIATES, FUELS, E.G. IN WELDING OR CUTTING APPLICATIONS, AND HAVE BIOLOGICAL ACTIVITY.