Cyclic Alkyne Approach to Heteroatom‐Containing Polycyclic Aromatic Hydrocarbon Scaffolds
作者:Evan R. Darzi、Joyann S. Barber、Neil K. Garg
DOI:10.1002/anie.201903060
日期:2019.7.8
strategy for accessing heteroatom‐containing polycyclicaromatichydrocarbons (PAHs). Our approach relies on the controlled generation of transient heterocyclic alkynes and arynes. The strained intermediates undergo in situ trapping with readily accessible oxadiazinones. Four sequential pericyclic reactions occur, namely two Diels–Alder/retro‐Diels–Alder sequences, which can be performed in a stepwise
[EN] METHODS FOR THE SYNTHESIS OF HETEROATOM CONTAINING POLYCYCLIC AROMATIC HYDROCARBONS<br/>[FR] PROCÉDÉS DE SYNTHÈSE D'HYDROCARBURES AROMATIQUES POLYCYCLIQUES CONTENANT DES HÉTÉROATOMES
申请人:UNIV CALIFORNIA
公开号:WO2020041369A1
公开(公告)日:2020-02-27
Methods for the synthesis of polycyclic aromatic hydrocarbons and synthesis platforms for performing such syntheses are provided. Methods and platforms are provided that allow for the synthesis of aza-polycyclic aromatic hydrocarbons by an expedient ring assembly. Methods and platforms allow for a modular approach to synthesis that provide multiple new C-C bonds in sequential pericyclic reactions, thus giving access to compounds with multiple axes of substitution.
Photocatalyzed facile synthesis of 2,5-diaryl 1,3,4-oxadiazoles with polyaniline- g-C3N4-TiO2 composite under visible light
作者:Liang Wang、Yaoyao Wang、Qun Chen、Mingyang He
DOI:10.1016/j.tetlet.2018.03.005
日期:2018.4
PANI (polyaniline)-g-C3N4-TiO2 composite was prepared and found to be efficient for the synthesis of 2,5-diaryl 1,3,4-oxadiazoles under visible light. This reaction involved decarboxylation and cyclization from cc-keto acids with acylhydrazines, and a broad scope of substrates were tolerated to provide the desired products in moderate to good yields. Control experiments indicated that a radical pathway was involved in the present photocatalytic reaction and a synergistic effect may exist in the ternary composite. Moreover, this semiconductor photocatalyst could be readily recovered and showed good reusability with only slight decrease in the catalytic activity after six consecutive runs. (C) 2018 Elsevier Ltd. All rights reserved.
Phosphites mediated decarboxylation of ?-iminoacids. A straightforward route to labelled ?-aminophosphates
This paper describes two simple procedures for the one pot synthesis of labelled alpha-aminophosphates using deuterated acetic acid as labelling source. The reaction of alkyl phosphites with alpha-iminoacids is studied in some detail.
Herstellung und Reaktionen von 2,5-Diphenyl-6-oxo-1,3,4-oxadiazin