The [1 + 4] cycloaddition of isocyanides with 1-aryl-2-nitro-1-propenes. Methyl 2-nitro-3-arylpropenoates and methyl 2-nitro-2,4-pentadienoates. Synthesis of 1-hydroxyindoles and 1-hydroxypyrroles
extremely well in a palladium‐catalyzed asymmetric decarboxylative [4+2] cycloaddition reaction, thus generating multiple contiguous stereocenters and a chiral quaternary center. By doing so, a straightforward route to highly functionalized tetrahydroquinolines was developed with yields of up to 99 %, as well as 98 % ee and greater than 95:5 d.r. Moreover, mechanisticinsights into this transformation
Synthesis of cucurbitine derivatives: facile straightforward approach to methyl 3-amino-4-aryl-1-methylpyrrolydine-3-carboxylates
作者:Daniel Blanco-Ania、Pedro H.H. Hermkens、Leo A.J.M. Sliedregt、Hans W. Scheeren、Floris P.J.T. Rutjes
DOI:10.1016/j.tet.2009.04.059
日期:2009.7
A general three- or four-step synthesis of cis- and trans-substituted cucurbitine (3-aminopyrrolidine-3-carboxylic acid) derivatives from methyl 2-nitroacetate is reported. The first step utilizes a Knoevenagel condensation with five different aromatic imines or their corresponding aldehydes to form (Z/E)-mixtures of α-nitro acrylates. The second step gives rise to the pyrrolidine-core structures of
作者:Kochetkov, K. A.、Babievskii, K. K.、Belikov, V. M.、Garbalinskaya, N. S.、Bakhmutov, V. I.
DOI:10.1007/bf00949634
日期:——
The [1 + 4] cycloaddition of isocyanides with 1-aryl-2-nitro-1-propenes. Methyl 2-nitro-3-arylpropenoates and methyl 2-nitro-2,4-pentadienoates. Synthesis of 1-hydroxyindoles and 1-hydroxypyrroles
作者:Andre Foucaud、Claudia Razorilalana-Rabearivony、Emile Loukakou、Herve Person