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    SYNTHESIS OF 5-NITROTETRAZOLE
    5.
    发明申请
    SYNTHESIS OF 5-NITROTETRAZOLE 有权

    公开(公告)号：US20220135530A1

    公开(公告)日：2022-05-05

    申请号：US17221863

    申请日：2021-04-05

    申请人： Purdue Research Foundation

    发明人： Davin Glenn Piercey ,  Timothy D. Manship ,  Dawson Michael Smith

    IPC分类号： C07D257/06

    摘要： This disclosure shows the ability of a readily-available oxidizer to achieve oxidation of 5-amino-1H-tetrazole (5-AT) to 5-nitrotetrazole (5-NT) in high yields in a single pot synthesis. This strategy reduces the synthesis of this important energetic material down to a single step and eliminates highly sensitive diazonium and copper salt primary explosive intermediates. The overall yield of this process is 48-53% and the resultant aqueous solution of product effectively used for the preparation of nitrotetrazole-containing primary explosive DBX-1. Unlike current methods of nitrotetrazole preparation, the novel method is entirely solution-based and prepares a final solution of sodium nitrotetrazolate, never once needing to handle energetic intermediates or products, making it a much safer method of nitrotetrazole preparation.

    Production of N-substituted aromatic hydroxylamine
    6.
    发明授权
    Production of N-substituted aromatic hydroxylamine 有权

    公开(公告)号：US11220484B2

    公开(公告)日：2022-01-11

    申请号：US16481984

    申请日：2018-01-30

    申请人： SOLVIAS AG

    发明人： Heinz Steiner

    IPC分类号： C07D231/22 ,  C07C269/00 ,  C07D257/06

    摘要： An economic, one-step method for the production of N-substituted aromatic hydroxylamines of formula (I) R—N(OH)—C(═O)—(O)R1  (I), with hydrogen, by catalytic hydration with possibly modified hydration catalysts in an aprotic solvent and in the presence of a halogen formic acid ester and in some cases in the presence of a base.