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    Substituted 1,2-dihydropyridines and process for preparing same
    92.
    发明授权
    Substituted 1,2-dihydropyridines and process for preparing same 失效
    取代的1,2-二羟基吡啶及其制备方法

    公开(公告)号：US4013661A

    公开(公告)日：1977-03-22

    申请号：US461685

    申请日：1974-04-17

    Applicant: Reinhard A. Sulzbach ,  Abul F. M. Iqbal

    Inventor： Reinhard A. Sulzbach ,  Abul F. M. Iqbal

    IPC: C07F7/10 ,  C08K5/544 ,  C10L1/14 ,  C10L1/22 ,  C10L1/24 ,  C10L1/28 ,  C07D215/58 ,  C07D211/92

    CPC classification number: C10L1/14 ,  C07F7/10 ,  C08K5/5442 ,  C10L1/232 ,  C10L1/2443 ,  C10L1/28

    Abstract: Substituted 1,2-dihydropyridines of the formula ##SPC1##In which R and R.sup.2 are selected from the group consisting of hydrogen, --NH.sub.2, silyl, silyl linked via oxygen, silyl linked via nitrogen, sulfamyl, organosulfonamido, nitro, organic radical, organic radical linked via oxygen, organic radical linked via sulfur, organic radical linked via nitrogen, organic radical linked via --SO-- and organic radical linked via --SO.sub.2 --; with the proviso that the R.sup.2 groupings when joined together form an ortho condensed cyclic or polycyclic hydrocarbon; R.sup.1 is a member selected from the group consisting of hydrogen, --NH.sub.2, silyl, silyl linked via oxygen, silyl linked via nitrogen, sulfamyl, organosulfonamido, nitro, organic radical, organic radical linked via oxygen, organic radical linked via sulfur, organic radical linked via nitrogen, organic radical linked via --SO-- organic radical linked via --SO.sub.2 --, mercapto, sulfino and sulfo; R.sup.3 is a member selected from the group consisting of hydrogen, halogen, and methyl; and Z is a member selected from the group consisting of halogen and an electron-withdrawing group containing an electronegative atom doubly or triply bonded to a more positive atom which atom is singly bonded to the carbon atom attached to the pyridine ring. Exemplary of such compositions is 1,4-bis(trimethylsilyl)-2-(1-cyanoethyl)-1,2-dihydropyridine. The compounds of the invention are useful as antioxidants for polyphenyl ethers, as stabilizers for halogenated polyhydrocarbons, as curing agents for silicones and epoxide resins, as dyeing improvers for polyesters and as fuel additives for imparting hypergolic properties.

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