Chemistry is an experimental science, Recommanded Product: 619-45-4, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 619-45-4, Name is Methyl 4-aminobenzoate, molecular formula is C8H9NO2, belongs to esters-buliding-blocks compound. In a document, author is Xu, You-Wei.
Enantioselective Copper-Catalyzed [3+3] Cycloaddition of Tertiary Propargylic Esters with 1H-Pyrazol-5(4H)-ones toward Optically Active Spirooxindoles
A copper-catalyzed enantioselective [3 + 3] cycloaddition of 3-ethynyl-2-oxoindolin-3-yl acetates with 1H-pyrazol-5(4H)-ones for the construction of optically active spirooxindoles bearing a spiro all-carbon quaternary stereocenter has been realized. With a combination of Cu(OTf)(2) and chiral tridentate ketimine P,N,N-ligand as the catalyst, the reaction displayed broad substrate scopes, good yields, and high enantioselectivities. This represents the first catalytic asymmetric propargylic cycloaddition with tertiary propargylic esters as the bis-electrophiles for access to chiral spirocyclic frameworks.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 619-45-4, in my other articles. Recommanded Product: 619-45-4.