5465-67-8Relevant articles and documents
Ligand-Enabled Copper-Catalyzed N-Alkynylation of Sulfonamide with Alkynyl Benziodoxolone: Synthesis of Amino Acid-Derived Ynamide
Takai, Ryogo,Shimbo, Daisuke,Tada, Norihiro,Itoh, Akichika
, p. 4699 - 4713 (2021/04/06)
Ynamides are versatile building blocks in organic synthesis. However, the synthesis of amino acid-derived ynamides is difficult but in high demand. Herein, we disclose the copper-catalyzed Csp-N coupling of sulfonamide, including amino acid and peptide derivatives, to give ynamides by using alkynyl benziodoxolones with broad functional group tolerance under mild reaction conditions. The electron-rich bipyridine as a ligand and ethanol as solvent were used for the success of this reaction. The usefulness of the obtained amino acid-derived ynamide as building block was showcased by further derivatization to unique amino acid derivatives. A control experiment to elucidate the mechanistic insight was also described.
1,7-naphthyridine derivative, preparation method and applications thereof
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Paragraph 0166; 0167; 0168; 0169, (2020/03/23)
The present invention relates to a compound represented by a formula (I) or a tautomer, an optical isomer, a nitrogen oxide, a solvate, a pharmaceutically acceptable salt or a prodrug thereof, a preparation method of the compound, a pharmaceutical composi
A α-cycloalanine on the preparation method
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Paragraph 0015; 0020-0022, (2017/04/29)
The invention relates to a method for synthesizing alpha-cycloalanine. The method comprises the steps of performing esterification on glycine serving as a raw material, synthesizing esterified product from the former step with p-benzene sulfonyl chloride, performing alkylation reaction on the synthesized product from the former step and 1,2-dibromoethane, and finally hydrolyzing to obtain a product. The method has the advantages of low process pollution, high yield, good purity, low cost and the like, is simple to operate and is a process suitable for industrialized production.