Copper-catalyzed routes have been achieved for the synthesis of 3-nitroquinolines from readily available nitroolefins and anthranils. This reaction proceeds via the [4+2] cycloaddition between anthranils and nitro-styrenes under mild reaction conditions to obtain biologically important heterocycles. A wide range of diversely substituted nitro-olefins and anthranils are successfully employed in this
Bifunctional acid–base ionic liquid for the one-pot synthesis of fine chemicals: Thioethers, 2H-chromenes and 2H-quinoline derivatives
作者:Maria J. Climent、Sara Iborra、Maria J. Sabater、Juan D. Vidal
DOI:10.1016/j.apcata.2014.05.004
日期:2014.7
A bifunctionalorganocatalyst with ionicliquid properties and with an optimized distancebetween the acid and basic sites efficiently activates electron deficient olefins for 1,4 conjugated addition, which can be incorporated in different one-pot transformations for the preparation of cyclic and acyclic compounds of biological and synthetic interest. More specifically, the catalyst can be successfully
An Investigation of the Reaction of 2-Aminobenzaldehyde Derivatives with Conjugated Nitro-olefins: An Easy and Efficient Synthesis of 3-Nitro-1,2-dihydroquinolines and 3-Nitroquinolines
作者:Ming-Chung Yan、Zhijay Tu、Chunchi Lin、Shengkai Ko、Jianming Hsu、Ching-Fa Yao
DOI:10.1021/jo030070z
日期:2004.3.1
prepared from the reaction of β-nitrostyrenes 2 and 2-aminobenzaldehyde 1 in the presence of DABCO. Not only β-nitrostyrenes but other alkyl nitro olefins also can be used in this reaction as well. When DDQ or silica gel was added to a solution of 3-nitro-1,2-dihydroquinolines 3, 3-nitro-2-substituted-quinolines 4 were obtained. When 2-aminobenzaldehyde derivatives 7 and 12 were reacted with β-nitrostyrenes
Hi, neighbor! The first organocatalyzed asymmetrictransferhydrogenation of aromatic nitrocompounds was successfully developed with up to 99 % ee. The new methodology provides a direct and facileaccess to enantiopure cyclicnitrocompounds with twocontiguousstereocenters.
A chiral phosphoric acid catalyzed asymmetric transfer hydrogenation of aromaticamines, quinolin-3-amines, was successfully developed with up to 99% ee. To supplement our previous work on the Ir-catalyzed asymmetrichydrogenation of 2-alkyl substituted quinolin-3-amines, a number of 2-aryl substituted substrates were reduced to provide a series of valuable chiralexocyclicamines with high diastereo-