The present invention provides novel dihydropyrancarboxamide compounds of formula (I):
1
and collections of these compounds, and provides methods for the synthesis of these compounds; wherein R
1
-R
6
are as defined herein. Additionally, the present invention provides pharmaceutical compositions and methods for treating disorders such as proliferative diseases, and cancer, to name a few.
Organocatalytic asymmetric conjugate addition of cyclic 1,3-dicarbonyl compounds to β,γ-unsaturated α-ketoesters
作者:Jin-jia Wang、Jin-hua Lao、Zhi-peng Hu、Rui-Jiong Lu、Shao-zhen Nie、Quan-sheng Du、Ming Yan
DOI:10.3998/ark.5550190.0011.922
日期:——
The conjugateaddition of cyclic1,3-dicarbonylcompounds to β,γ-unsaturated α-keto-esters was studied using a series of chiral bifunctional organocatalysts. Takemoto’s catalyst was found to be most efficient for this transformation. Excellent yields and good enantioselectivities were achieved for a variety of β,γ-unsaturated α-keto-esters and cyclic1,3-dicarbonylcompounds. A bifunctional catalytic
The asymmetric construction of quaternarycarboncentersviacross-aldolreactions of ketones with β,γ-unsaturated keto esters catalyzed by 4-(tert-butyldiphenylsilyloxy)-pyrrolidine-2-carboxylic acid in water is described. The adducts bearing two adjacent chiral centers were obtained in high yields, mostly up to 99% ee, and with high diastereoselectivities. The corresponding polyfunctional products
An unexpected tandem enantioselective Michael addition/oxa-nucleophilic rearrangement reaction of β,γ-unsaturated α-keto esters catalyzed by cinchona alkaloids
Cinchona alkaloids were found to catalyze an enantioselectiveMichaeladdition/oxa-nucleophilic rearrangement reaction of β,γ-unsaturated α-keto esters 1 and malonates 2. Using the optimum catalyst quinine 4a, a series of the rearranged products 3 were obtained with up to 98% yield and 82% ee under mild reaction conditions.
The bifunctional organocatalyst C3 N,N'-dioxide has been successfully applied to the asymmetric cascade Michael/hemiacetalization reaction of alpha-substituted cyano ketones and beta,gamma-unsaturated alpha-ketoesters for the synthesis of multifunctionalized chiral dihydropyrans. The corresponding products were obtained in excellent yields (up to 99%) with high to excellent enantioselectivities (up to 99% ee).