[EN] CASPASE INHIBITOR COMPRISING 2-ALKYL-4-OXOBUTANOYL GROUP AND PHARMACEUTICAL COMPOSITION THEREOF [FR] INHIBITEUR DES CASPASES COMPRENANT UN GROUPE 2-ALKYL-4-OXOBUTANOYLE ET COMPOSITION PHARMACEUTIQUE CONTENANT CELUI-CI
Iron-Catalyzed <i>Ortho</i> C–H Methylation of Aromatics Bearing a Simple Carbonyl Group with Methylaluminum and Tridentate Phosphine Ligand
作者:Rui Shang、Laurean Ilies、Eiichi Nakamura
DOI:10.1021/jacs.6b06908
日期:2016.8.17
(Me2N-TP), that allows us to convert an ortho C-H bond to a C-CH3 bond in aromatics and heteroaromatics bearing simple carbonyl groups under mild oxidative conditions. The reaction is powerful enough to methylate all four ortho C-H bonds in benzophenone. The reaction tolerates a variety of functionalgroups, such as boronic ester, halide, sulfide, heterocycles, and enolizable ketones.
N–H Insertion reactions of rhodium carbenoids. Part 3.1 The development of a modified Bischler indole synthesis and a new protecting-group strategy for indoles
作者:Katherine E. Bashford、Anthony L. Cooper、Peter D. Kane、Christopher J. Moody、Sendogagounder Muthusamy、Elizabeth Swann
DOI:10.1039/b202666j
日期:2002.7.11
A modified version of the Bischler indole synthesis has been developed in which the key step is the NâH insertion reaction of rhodium carbene intermediates derived from α-diazo-β-ketoesters with anilines. Thus N-methylanilines 1 react with diazoketoesters 2 in the presence of dirhodium(II) acetate to give (N-arylamino)ketones 3, cyclisation of which using boron trifluorideâethyl acetate or acidic ion exchange resin gives the indoles 4. In order to extend this method to the synthesis of N-unsubstituted indoles, a new protecting group strategy for indoles was developed. In this, anilines are reacted with α,β-unsaturated-esters or -sulfones to give the conjugate addition products 6 and 9,
cyclisation of which gives indoles 8 and 11. The N-(2-ethoxycarbonylethyl)- and -(2-sulfonylethyl)- protecting groups are readily removed from indoles 8 and 11 by treatment with base.
The synthesis and reactions of 2-bis(methylthio)methylene-1-methyl-3-oxoindole 5 as a novel 3-carbon 1,3-bielectrophilic component are described. Thus cycloaromatization of 5 with allyl, methallyl and crotyl Grignard reagents affords substituted carbazoles 12a-c in good yields. Cycloaromatization of 5 with various anions derived from aryl / heteroaryl acetonitriles and antipyrine gives novel , , ,
描述了作为一种新型的3-碳1,3-双亲电子组分的2-双(甲硫基)亚甲基-1-甲基-3-氧代吲哚5的合成和反应。因此,用烯丙基,甲基烯丙基和巴豆基格氏试剂对5进行环芳构化可得到高产率的取代咔唑12a-c。的Cycloaromatization 5与衍生自各种阴离子芳基/杂芳基乙腈和安替比林给出新颖,,,,和以良好产率的咔唑环体系。同样杂环[ b ]吲哚-融合喜欢,吲哚和吲哚并[3,2- b ] quinolizinium盐42通过杂芳环化方案,分别用硫代乙腈,硫代氨基丁腈和2-吡啶甲基锂将5环化,合成了它们。
N-H Insertion Reactions of Rhodium Carbenoids: A Modified Bischler Indole Synthesis
作者:Christopher J. Moody、Elizabeth Swann
DOI:10.1055/s-1998-1610
日期:1998.2
Rhodium(II) acetate catalysed reaction of α-diazo-β-ketoesters with N-methylanilines results in carbenoid insertion into the N-H bond; the resulting α-(N-arylamino)ketones cyclise to give indoles upon treatment with acidic ion-exchange resin.
The acid-promoted reactions of phenyliodonium ylides with substituted anilines and their applications to the synthesis of indoles
作者:Xianpei Wang、Bing Han、Junyan Wang、Wei Yu
DOI:10.1039/c0ob00201a
日期:——
N-substituted anilines 1 react readily with phenyliodonium ylides 2 derived from 1,3-dicarbonyl compounds in the presence of a catalytic amount of BF3·Et2O, forming the C–N coupling products 3, which are precursors for the synthesis of indoles. On the basis of this result, the direct synthesis of indoles from 1 and 2 under thermal conditions and photochemical conditions was explored. The transformations could