1592-00-3Relevant articles and documents
Supporting-Electrolyte-Free Anodic Oxidation of Oxamic Acids into Isocyanates: An Expedient Way to Access Ureas, Carbamates, and Thiocarbamates
Petti, Alessia,Fagnan, Corentin,van Melis, Carlo G. W.,Tanbouza, Nour,Garcia, Anthony D.,Mastrodonato, Andrea,Leech, Matthew C.,Goodall, Iain C. A.,Dobbs, Adrian P.,Ollevier, Thierry,Lam, Kevin
supporting information, p. 2614 - 2621 (2021/06/27)
We report a new electrochemical supporting-electrolyte-free method for synthesizing ureas, carbamates, and thiocarbamates via the oxidation of oxamic acids. This simple, practical, and phosgene-free route includes the generation of an isocyanate intermediate in situ via anodic decarboxylation of an oxamic acid in the presence of an organic base, followed by the one-pot addition of suitable nucleophiles to afford the corresponding ureas, carbamates, and thiocarbamates. This procedure is applicable to different amines, alcohols, and thiols. Furthermore, when single-pass continuous electrochemical flow conditions were used and this reaction was run in a carbon graphite Cgr/Cgr flow cell, urea compounds could be obtained in high yields within a residence time of 6 min, unlocking access to substrates that were inaccessible under batch conditions while being easily scalable.
Sulfonylurea dehydroabietate compound and preparation method and application thereof
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Paragraph 0042; 0044; 0048-0049, (2019/02/04)
The invention discloses a sulfonylurea dehydroabietate compound and a preparation method and application thereof. The compound has a chemical structural formula represented by a formula shown in the description, wherein R1 is 2-Br, 3-Br, 4-Br, 4-OCH3, 4-F, 2-CH3, 3-CH3, 4-CH3, 2-Cl, 3-Cl or H, and 2, 3 and 4 represent 2, 3 and 4 substituent sites on a benzene ring. The preparation method of the compound comprises the following steps synthesizing sulfonyl chloride dehydroabietate; synthesizing sulfonamide dehydroabietate; synthesizing substituted phenyl isocyanate; synthesizing N'-substituted phenyl-12-sulfonylurea dehydroabietate. The compound disclosed by the invention has better activity and low toxicity and provides a better lead compound for developing antitumor drugs.
Design, synthesis and evaluation of 1,2-benzisothiazol-3-one derivatives as potent caspase-3 inhibitors
Liu, Dazhi,Tian, Zhen,Yan, Zhihui,Wu, Lixin,Ma, Yan,Wang, Quan,Liu, Wei,Zhou, Honggang,Yang, Cheng
, p. 2960 - 2967 (2013/07/28)
A number of 1,2-benzisothiazol-3-one derivatives were prepared through structural modification of the original compound from high-throughput screening. Some analogues (e.g., 6b, 6r, 6s and 6w) were identified as novel and potent caspase inhibitors with IC50 of nanomolar. Structure-activity relationship (SAR) studies for caspase-3 inhibition were evaluated in vitro. Molecular modeling studies provided further insight into the interaction of this class of compounds with activated caspase-3. The present small molecule caspase-3 inhibitor with novel structures different from structures of known caspase inhibitors revealed a new direction for therapeutic strategies directed against diseases involving abnormally up-regulated apoptosis.
