Pd(0)-Catalyzed Oxy- and Aminoalkynylation of Olefins for the Synthesis of Tetrahydrofurans and Pyrrolidines
摘要:
The first Pd(0)-catalyzed intramolecular oxy- and aminoalkynylation of nonactivated olefins is reported. The reaction gives access to important tetrahydrofuran and pyrrolidine heterocycles with high diastereoselectivity. The unique synthetic potential of acetylenes is further exploited to access key building blocks for the synthesis of bioactive natural products.
Ligand-Promoted <i>meta</i>-C–H Amination and Alkynylation
作者:Peng Wang、Gen-Cheng Li、Pankaj Jain、Marcus E. Farmer、Jian He、Peng-Xiang Shen、Jin-Quan Yu
DOI:10.1021/jacs.6b08942
日期:2016.10.26
Using a modified norbornene (methyl bicyclo[2.2.1]hept-2-ene-2-carboxylate) as a transient mediator, meta-C-H amination and meta-C-H alkynylation of aniline and phenol substrates have been developed for the first time. Both the identification of a monoprotected 3-amino-2-hydroxypyridine/pyridone-type ligand and the use of a modified norbornene as a mediator are crucial for the realization of these
Iron‐Catalyzed C−H Alkynylation through Triazole Assistance: Expedient Access to Bioactive Heterocycles
作者:Gianpiero Cera、Tobias Haven、Lutz Ackermann
DOI:10.1002/chem.201700587
日期:2017.3.13
Triazole assistance enabled the first iron‐catalyzed C−H alkynylation of arenes, heteroarenes, and alkenes. The modular TAM directing group set the stage for a sequential C−H alkynylation/annulation strategy with ample scope, enabling the iron‐catalyzed assembly of isoquinolones, pyridones, pyrrolones, and isoindolinones with high levels of chemo‐, site‐, and regioselectivity.
[EN] SYNTHESIS OF DISORAZOLES AND ANALOGS THEREOF AS POTENT ANTICANCER AGENTS<br/>[FR] SYNTHÈSE DE DISORAZOLES ET DE LEURS ANALOGUES EN TANT QU'AGENTS ANTICANCÉREUX PUISSANTS
申请人:UNIV RICE WILLIAM M
公开号:WO2018237178A1
公开(公告)日:2018-12-27
In one aspect, the present disclosure provides disorazole analogs of the formula: Formula (I) wherein the variables are as defined herein. In another aspect, the present disclosure also provides methods of preparing the compounds disclosed herein. In another aspect, the present disclosure also provides pharmaceutical compositions and methods of use of the compounds disclosed herein. Additionally, drug conjugates with cell targeting moieties of the compounds are also provided.
Herein, we report a highly efficient and practical method for pyridine‐derived heterobiaryl synthesis through palladium‐catalyzed electrophilic functionalization of easily available pyridine‐derived quaternary phosphonium salts. The nice generality of this reaction was goes beyond arylation, enabling facile incorporation of diverse carbon‐based fragments, including alkenyl, alkynyl, and also allyl
Rhodium-Catalyzed CH Alkynylation of Arenes at Room Temperature
作者:Chao Feng、Teck-Peng Loh
DOI:10.1002/anie.201309198
日期:2014.3.3
The rhodium(III)‐catalyzed ortho CH alkynylation of non‐electronically activated arenes is disclosed. This process features a straightforward and highly effective protocol for the synthesis of functionalized alkynes and represents the first example of merging a hypervalent iodine reagent with rhodium(III) catalysis. Notably, this reaction proceeds at room temperature, tolerates a variety of functional