Preparation of Heterocyclic Amines by an Oxidative Amination of Zinc Organometallics Mediated by CuI: A New Oxidative Cycloamination for the Preparation of Annulated Indole Derivatives
作者:Marcel Kienle、Andreas J. Wagner、Cora Dunst、Paul Knochel
DOI:10.1002/asia.201000367
日期:2011.2.1
Functionalized heterocyclic zinc reagents are easily aminated by an oxidativeaminationreaction of zinc amidocuprates prepared from various lithium amides. For the oxidation step, PhI(OAc)2 proved to be the best reagent. The required heterocyclic zinc organometallics can be prepared either by direct metalation, by magnesium insertion in the presence of ZnCl2, or by transmetalation of a suitable magnesium
CScoupling: A variety of arylthio‐substitutedheterocycles can be prepared through CScoupling of the corresponding halide‐substitutedheterocycles by using a mixed‐ligand palladium catalyst, [Pd2(dba)3]/ Xantphos/CyPF‐tBu (see scheme; dba=dibenzylideneacetone). This catalytic system is extremely powerful and efficient, allowing even CCl bond activation.
Preparation of Heterocyclic Amines via a Copper(I)-Mediated Oxidative Cross-Coupling of Organozinc Reagents with Lithium Amides
作者:Paul Knochel、Cora Dunst、Marcel Kienle
DOI:10.1055/s-0029-1220008
日期:2010.7
Functionalized heteroaromatic amines are readily prepared by the oxidative coupling of polyfunctional zinc amidocuprates using PhI(OAc)2 as oxidant. Various sensitive heterocyclic organometallics undergo this oxidativecross-coupling reaction furnishing aminated heteroaromatics. A high functional group tolerance and relative insensibility to steric hindrance characterize this general amination reaction
S-Alkylation en s�rie h�t�rocyclique par catalyse par transfert de phase: thioalkyl-2-thiazoles, thioalkyl-2-?-4-thiazolines et thioalkyl-2-benzothiazoles
作者:Henri J. M. Dou、Parina Hassanaly、Jacky Kister、Gaston Vernin、Jacques Metzger
DOI:10.1002/hlca.19780610842
日期:1978.12.13
S-Alkylation in heterocyclic serie by phase transfer catalysis: 2-alkylthiothiazoles, 2-alkylthio-Δ-4-thiazolines and 2-alkylthiobenzothiazoles
相转移催化在杂环系列中的S-烷基化:2-烷硫基噻唑,2-烷硫基-Δ-4-噻唑啉和2-烷硫基苯并噻唑
One-Pot Synthesis of Symmetrical and Unsymmetrical Aryl Sulfides by Pd-Catalyzed Couplings of Aryl Halides and Thioacetates
作者:Namjin Park、Kyungho Park、Mihee Jang、Sunwoo Lee
DOI:10.1021/jo2007253
日期:2011.6.3
Aryl sulfides were obtained from the coupling reaction of S-aryl (or S-alkyl) thioacetates and aryl bromides in the presence of palladium catalyst. This reaction method enables the one-pot synthesis of symmetrical and unsymmetrical diaryl sulfides by employing potassium thioacetate with aryl iodides and aryl bromides.