Sequential Michael addition/retro-Claisen condensation of 1,3-diarylpropan-1,3-diones with nitrostyrenes: one-step synthesis of 4-nitro-1,3-diarylbutan-1-ones
作者:ZHENG LI、HAO LU、ZHENRONG LIU、XIAOLONG MA
DOI:10.1007/s12039-019-1603-z
日期:2019.4
Abstract The sequential Michael addition/retro-Claisencondensation of 1,3-diarylpropan-1,3-diones with nitrostyrenes is described. 4-Nitro-1,3-diarylbutan-1-ones were efficiently synthesized in good to high yield under mild, transition-metal-free condition. This one-step method involving sequential carbon-carbon bond formation and cleavage provides a good alternative to the synthesis of various \(\gamma
Highly Enantioselective Synthesis of γ-Nitro Heteroaromatic Ketones in a Doubly Stereocontrolled Manner Catalyzed by Bifunctional Thiourea Catalysts Based on Dehydroabietic Amine: A Doubly Stereocontrolled Approach to Pyrrolidine Carboxylic Acids
作者:Xianxing Jiang、Yifu Zhang、Albert S. C. Chan、Rui Wang
DOI:10.1021/ol8025268
日期:2009.1.1
class of dehydroabietic amine-substituted primary amine-thiourea bifunctional catalysts were designed and synthesized. The doubly stereocontrolled organocatalytic conjugateaddition of a variety of heterocycles-bearing ketones to nitroalkenes was investigated for the first time, affording (S)- or (R)-γ-nitro heteroaromatic ketones with excellent enantioselectivities (up to ee >99%). Furthermore, the nearly
A novel synthesis of γ-nitro ketones via detrifluoroacetylative Michael addition of 1-trifluoromethyl-1,3-diketones to conjugated nitroalkenes
作者:Alexey Yu. Barkov、Vladislav Yu. Korotaev、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.tetlet.2013.10.008
日期:2013.12
A novel synthesis of γ-nitro ketones via detrifluoroacetylative Michaeladdition of 1-trifluoromethyl-1,3-diketones to conjugated nitroalkenes in the presence of sodium acetate in ethanol at room temperature is developed. A series of trifluoromethylated 1,3-diones and nitroalkenes are surveyed to determine the scope of this high-yielding reaction.
Asymmetric AZA-BODIPY with Optical Gain in the Near-Infrared Region
作者:Tersilla Virgili、Lucia Ganzer、Chiara Botta、Benedetta Maria Squeo、Mariacecilia Pasini
DOI:10.3390/molecules27144538
日期:——
organic compounds emitting in the near-infrared (NIR) region due to their stimulating applications, such as biosensing and light detection and ranging (LiDAR). Moreover, a lot of effort has been devoted to finding organic emitters with optical gain in the NIR region for lasing applications. In this paper, we present the ultrafast spectroscopy of an asymmetric AZA-BODIPY molecule that shows relevant photophysical
A mild synthetic route to α-nitroso diaryl pyrroles
作者:Emily B. Brown、Rosinah Liandrah Gapare、Jacob W. Campbell、Adil Alkaş、Steve Sequeira、James W. Hilborn、Sarah M. Greening、Katherine N. Robertson、Alison Thompson
DOI:10.1039/d4ob00935e
日期:——
A new synthetic method to access α-nitroso pyrroles is presented. This method utilises the nitrosonium salt NOBF4, enabling short reaction times (<10 minutes) and avoiding the harsh acidic conditions usually associated with pyrrole nitrosation. Application of this procedure to diarylated pyrroles yielded several novel nitroso-pyrroles. Modifications to the method, through exclusion of air and inclusion