α-Keto amide derivatives as enterovirus 71 (EV71) 3C protease (3Cpro) inhibitors have been synthesized and assayed for their biochemical and antiviral activities. structure–activity relationship (SAR) study indicated that small moieties were primarily tolerated at P1′ and the introduction of para-fluoro benzyl at P2 notably improved the potency of inhibitor. Inhibitors 8v, 8w and 8x exhibited satisfactory
5‐Triazinanes were used as easily accessible, bench‐stable formaldimine surrogates in the Ugi reaction for rapid assembly of glycinamide derivatives with three elements of diversity, in good to nearly quantitative yields. This protocol was applied for one‐pot two‐step syntheses of lidocaine and severalunsymmetrically substituted diketopiperazines.
A facile conversion of formamides to isonitriles under very mild conditions and microwave irradiation is described. This simple and efficient method has been applied for the synthesis of both aliphatic and aromatic isonitriles in high yields.
Enhancing the Scope of the Diels–Alder Reaction through Isonitrile Chemistry: Emergence of a New Class of Acyl-Activated Dienophiles
作者:Steven D. Townsend、Xiangyang Wu、Samuel J. Danishefsky
DOI:10.1021/ja303876e
日期:2012.6.27
valuable family of dienophiles for servicing Diels-Alderreactions. These systems are assembled through extension of recently discovered isonitrile chemistry to the domain of α,β-unsaturated acids. Cycloadditions are facilitated by Et(2)AlCl, presumably via chelation between the two carbonyl groups of the N-formyl amide. Applications of the isonitrile/Diels-Alder logic to the IMDA reaction, as well as methodologies
Synthesis of Isocyanides by Reacting Primary Amines with Difluorocarbene
作者:Yi-Xin Si、Peng-Fei Zhu、Song-Lin Zhang
DOI:10.1021/acs.orglett.0c03472
日期:2020.11.20
route for preparing a versatile building block of isocyanides from primary amines is developed. Difluorocarbene, generated in situ from decarboxylation of chlorodifluoroacetate, reacts efficiently with primary amines to produce isocyanides. Various primary amines are well tolerated, including aryl, heteroaryl, benzyl, and alkyl amines, as well as amine residues in amino acids and peptides. Late-stage