Efficient Assembly of Iminodicarboxamides by a “Truly” Four-Component Reaction
作者:Kareem Khoury、Mantosh K. Sinha、Tadamichi Nagashima、Eberhardt Herdtweck、Alexander Dömling
DOI:10.1002/anie.201205366
日期:2012.10.8
Mix and match: Similar to a galaxy consisting of millions of stars, a multicomponent reaction (MCR) system can result in millions of compounds. The MCR of α‐amino acids, oxo components, isocyanides, and amines leads to numerous and diverse compounds, thus having enormous potential for drug discovery or catalyst screening.
The preparation of N-substituted aminomethylidenebisphosphonates and their tetraalkyl esters via reaction of isonitriles with trialkyl phosphites and hydrogen chloride. Part 1
The reaction of isonitriles with trialkyl phosphites in the presence of hydrogen chloride gives tetraalkyl N-substituted aminomethylidenebisphosphonates via N-methylideneaminium (isonitrilium) salts. Hydrolysis or dealkylation of these tetraalkyl esters gives N-substituted aminomethylidenebisphosphonic acids in high yields.
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-disubstituted tetrazoles (1,5-DTs) is presented. The strategy exploits a reductiveapproach to synthetize a cyclic chiral imine substrate which is then converted into the target productthrough an Ugi-azide three-component reaction (UA-3CR). The final products are equipped with additional functionalities which can be further elaborated for the generation of combinatorial libraries of enantiopure heterocycles
An infrared spectroscopic study of the tautomeric equilibria in solutions of tricarbonylbis(η-dienyl)isocyanidedi-iron complexes
作者:John Bellerby、Michael J. Boylan、Mary Ennis、A. R. Manning
DOI:10.1039/dt9780001185
日期:——
Infrared spectra of solutions of [Fe2(η-dienyl)2(CO)3(CNR)] derivatives (dienyl = C5H5, C5H4Me, or C9H7; R = alkyl or benzyl) show that four isomers are present. They have structures based on cis- and trans-[Fe2(η-C5H5)2,-(µ-CO)2(CO)2]. In two isomers the isocyanide ligand has replaced a µ-CO group, whilst in others it has replaced a terminal (t) ligand. The equilibria shift towards this latter pair
[Fe 2(η-二烯基)2(CO)3(CNR)]衍生物(二烯基= C 5 H 5,C 5 H 4 Me或C 9 H 7; R =烷基或苄基)的溶液的红外光谱显示存在四个异构体。它们具有结构基于顺式-和反式- [铁2(η-C 5 H ^ 5)2, - (μ-CO)2(CO)2]。在两个异构体中,异氰酸酯配体取代了µ-CO基团,而在另一些异构体中,它取代了末端(t)配体。当(a)R = Me