A highly efficient strategy for the kinetic resolution of Michael adducts was realized using a chiral N‐heterocyclic carbene catalyst. The kinetic resolution provides a new convenient route to single diastereomers of cyclohexenes and Michael adducts in good yields with high enantiomeric excesses (up to 99 % ee with a selectivity factor of up to 458). This “two flies with one swat” concept allows the
Michael Addition of Active Methylene Compounds to α,β-Unsaturated Carbonyl Compounds under the Influence of Molecular Sieves in Dimethyl Sulfoxide
作者:Tomoko Kakinuma、Ryoichi Chiba、Takeshi Oriyama
DOI:10.1246/cl.2008.1204
日期:2008.12.5
The Michael addition of active methylene compounds to α,β-unsaturated carbonyl compounds in the presence of MS 4A in dimethyl sulfoxide proceeds smoothly to afford the corresponding 1,4-addition pr...
One‐Pot Sequential Synthesis of Fused Isoquinolines via Intramolecular Cyclization/Annulation and their Photophysical Investigation
作者:Amitava Rakshit、Prasenjit Sau、Subhendu Ghosh、Bhisma K. Patel
DOI:10.1002/adsc.201900543
日期:2019.8.21
1‐a]isoquinoline‐3‐carbonitrile. This one‐pot process is associated with the formation of one C−C, two C−N, two C=C and a C=O bonds. The final synthesis is a four‐step process consisting of selective hydrolysis of a cyano group to an amide, dehydrative cyclization of the amide to a cyclic amide, aromatization of the cyclic amide (2‐oxo‐1,2,3,4‐tetrahydropyridine moiety) to a 2‐oxo‐1,2‐dihydropyridine and finally
The Michael Addition of Active Methylene Compounds to Chalcone Derivatives using a Catalytic Amount of Iodine and K<sub>2</sub>CO<sub>3</sub> at Room Temperature
作者:Yi-Ming Ren、Chun Cai
DOI:10.3184/174751911x12984726527461
日期:2011.3
A convenient method for the Michael addition of activemethylenecompounds to chalcone derivatives has been developed using the inexpensive and environmentally friendly reagent I2/K2CO3 at room temperature. The method is mild and proceeds with good to high yields.
A facile and efficient synthesis of polysubstituted benzenes has been developed via sequential Michael addition, Knoevenagel condensation and nucleophilic cyclization reactions of readily available chalcones with active methylene compounds in guanidinium ionic liquids.