Process for synthesizing carbapenem intermediates
    7.
    发明授权
    Process for synthesizing carbapenem intermediates 失效
    合成碳青霉烯中间体的方法

    公开(公告)号:US06194568B1

    公开(公告)日:2001-02-27

    申请号:US09326762

    申请日:1999-06-04

    IPC分类号: C07D47714

    CPC分类号: C07D477/02 Y02P20/55

    摘要: The invention describes an improved process for synthesizing 1-&bgr;-methyl-2-hydroxymethyl substituted carbapenems as key intermediates for the synthesis of anti-MRSA carbapenem antibiotics. The synthesis eliminates the use of BU3SnCH2OH and HMPA, which are toxic substances and not amenable to industrial scale production. The novel intermediates are also within the scope of this invention. The invention relates to the synthesis of a compound of formula 3: wherein R1 represents H or a suitable protecting group for an alcohol; R2 represents H or methyl; and R5 represents a carboxy protecting group as well as the compounds made therein.

    摘要翻译: 本发明描述了合成1-β-甲基-2-羟甲基取代的碳青霉烯作为合成抗MRSA碳青霉烯类抗生素的关键中间体的改进方法。 合成消除了使用有毒物质的BU3SnCH2OH和HMPA,不适合工业规模生产。 新颖的中间体也在本发明的范围内。本发明涉及式3化合物的合成:其中R1表示H或适当的醇保护基; R2表示H或甲基; 并且R 5表示羧基保护基以及其中制备的化合物。

    Aptamer-based sensors for detection of fentanyl opioids

    公开(公告)号:US11408850B2

    公开(公告)日:2022-08-09

    申请号:US17354342

    申请日:2021-06-22

    申请人: Yi Xiao Juan Canoura

    发明人: Yi Xiao Juan Canoura

    摘要: The subject invention provides materials and methods for single-step fluorescence and electrochemical detection of small molecules, e.g., fentanyl and its analogs, in a sample. The subjection invention provides nucleic acids materials, e.g., aptamers (nucleic acid oligonucleotides) that can bind to fentanyl and its analogs with nanomolar affinity and high specificity against illicit drugs, adulterants, and cutting agents commonly existing in seized samples. The method for detecting fentanyl and/or its analogs in a sample comprises contacting the sample with an aptamer-based sensor selective for fentanyl and its analogs, and sensitively, specifically, and rapidly detecting fentanyl and/or its analogs in the sample.

    Material and method for colorimetric detection of small-molecule targets

    公开(公告)号:US10948504B2

    公开(公告)日:2021-03-16

    申请号:US16902717

    申请日:2020-06-16

    摘要: The subject invention provides methods, assays, and products for visual detection of small-molecule targets in a sample in both clinical and field settings within minutes. The subject invention is based on an aptamer sensor that reports the presence of small-molecule target via a sensitive colorimetric signal for naked-eye detection. The aptamer sensor is a CBSAzyme-based sensor having both target-mediated cooperative behavior of the CBSA and peroxidase-mimicking catalytic activity of DNAzyme. The subject invention also provides methods of using the CBSAzyme-based sensor.