Koerner; Contardi, Atti della Accademia Nazionale dei Lincei, Classe di Scienze Fisiche, Matematiche e Naturali, Rendiconti, 1913, vol. <5> 22 I, p. 823
Polymer-Supported Organotin Reagents for Regioselective Halogenation of Aromatic Amines
作者:Jean-Mathieu Chrétien、Françoise Zammattio、Erwan Le Grognec、Michaël Paris、Blanche Cahingt、Gilles Montavon、Jean-Paul Quintard
DOI:10.1021/jo0480141
日期:2005.4.1
halides were used in the halogenation reaction of aromaticamines. Treatment of aromaticamines with n-butyllithium and polymer-supported organotin halides gave the corresponding polymer-bound N-triorganostannylamines, which by treatment with bromine or iodine monochloride gave the para-halogenated aromaticamines with high yields and high selectivities. The polymer-supported organotin halides reagents
The totalsynthesis of (±)-hinckdentine A is described herein. A cyanide-catalyzed imino-Stetter reaction of the aldimine derived from ethyl 2-amino-3,5-dibromocinnamate and 5-bromo-2-nitrobenzaldehyde followed by oxidative rearrangement afforded a 2,2-disubstituted 3-indolinone derivative containing the carbon skeleton and all of the functional groups present in the natural product correctly positioned
Asymmetric Radical and Anionic Cyclizations of Axially Chiral Carbamates
作者:David B. Guthrie、Dennis P. Curran
DOI:10.1021/ol802616u
日期:2009.1.1
Cbz derivatives of N-2,4-dimethyl-6-iodophenyl-N-allyl anilines are axiallychiral and can be readily resolved into atropisomers whose racemization barriers exceed 30 kcal/mol. The resolved axiallychiral carbamates undergo radical and anionic cyclizations with high levels of chiralitytransfer from the N−Ar axis to the new stereocenter in the substituted dihydroindole products. The carbamate groups of
N -2,4-二甲基-6-碘苯基-N-烯丙基苯胺的标准Boc,Alloc和Cbz衍生物在轴向上是手性的,可以容易地拆分为消旋势垒超过30 kcal / mol的阻转异构体。拆分后的轴向手性氨基甲酸酯会经历自由基和阴离子环化反应,并且在取代的二氢吲哚产物中会从N-Ar轴向新的立体中心高水平的手性转移。产品的氨基甲酸酯基团很容易除去。
Synthesis of polyfunctional indoles and related heterocycles mediated by cesium and potassium bases
作者:Christopher Koradin、Wolfgang Dohle、Alain L Rodriguez、Bertram Schmid、Paul Knochel
DOI:10.1016/s0040-4020(03)00073-5
日期:2003.2
A general preparation of 2-substituted indoles starting from functionalized 2-alkynylanilines has been developed. This base mediated reaction has also been used to synthesize the heterocyclic core of the marine alkaloid hinckdentine A. Furthermore the reaction was successfully adapted to the solid phase. Benzofurans and isoindolones could also be prepared with this method. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of Polyfunctionalized Biphenyls as Intermediates for a New Class of Liquid Crystals
作者:Jason T. Manka、Fengli Guo、Jianping Huang、Huiyong Yin、John M. Farrar、Monika Sienkowska、Vladimir Benin、Piotr Kaszynski
DOI:10.1021/jo030212p
日期:2003.12.1
A series of hexa- and octasubstituted biphenyls containing halogen, amino, nitro, and propylthio substituents were prepared by metal-mediated convergent synthesis from halobenzene precursors. The Pd-assisted C-C coupling methods were ineffective in the formation of the Ar-Ar bond except for the synthesis of 1b. All tetra-ortho-substituted biphenyls were prepared via Ullmann coupling reactions. The halogens were introduced after formation of the biphenyl by utilizing the directing properties of the amino group(s). In the case of 3b, a polyhalogenated benzene substrate was used for biphenyl formation via Ullmann coupling.