We introduce novel 3-alkenyl-2-silyloxyindole nucleophiles and demonstrate their utility by developing an unprecedented vinylogous Mukaiyama-type aldol reaction with aromatic aldehydes. This reaction displays excellent levels of γ- site selectivity and diastereoselectivity and delivers valuable hydroxylated oxindoles bearing a substituted exocyclic double bond at the C-3 position. A preliminary trial
The present invention relates to new CGRP-antagonists of general formula I
wherein U, V, X, Y, R
1
, R
2
, R
3
and R
4
are defined as mentioned in the description, the tautomers thereof, the isomers thereof, the diastereomers thereof, the enantiomers thereof, the hydrates thereof, the mixtures thereof and the salts thereof as well as the hydrates of the salts, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases, medicaments containing these compounds, the use thereof and processes for the preparation thereof.
Copper(<scp>i</scp>)/Ganphos catalysis: enantioselective synthesis of diverse spirooxindoles using iminoesters and alkyl substituted methyleneindolinones
A copper-catalyzed asymmetric 1,3-dipolar cycloaddition of glycine iminoesters with alkyl substituted 3-methylene-2-oxindoles is described. By using de novo design of P-stereogenic phosphines as ligands, spiro[pyrrolidin-3,3'-oxindole]s are generated in good to excellent yields with high asymmetric induction. A further reduced catalyst loading of 0.1 mol% is sufficient to achieve a satisfactory enantioselectivity
Visible light induced hydrodifluoromethylation of alkenes derived from oxindoles with (difluoromethyl)triphenylphosphonium bromide
作者:Wei-Qiang Hu、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1016/j.jfluchem.2018.01.013
日期:2018.4
A visible light induced hydrodifluoromethylation of alkenes derived from oxindoles with (difluoromethyl)triphenylphosphonium bromide was developed. This reaction delivers a series of previously unknown difluoromethylated oxindoles containing CCF2H quaternary centers in moderate to excellent yields. The resulting CF2H-containing oxindoles are potentially useful in drug discovery.
The present invention relates to new CGRP-antagonists of general formula I
wherein U, V, X, Y, R1, R2, R3 and R4 are defined as mentioned in the description, the tautomers thereof, the isomers thereof, the diastereomers thereof, the enantiomers thereof, the hydrates thereof, the mixtures thereof and the salts thereof as well as the hydrates of the salts, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases, medicaments containing these compounds, the use thereof and processes for the preparation thereof.