The first catalytic asymmetric exo′‐selective [3+2] cycloaddition of methyleneindolinones with iminoesters was achieved for construction of novel diastereomers of spiro[pyrrolidin‐3,3′‐oxindole]. By using the imidazoline–aminophenol‐ligand complex [Ni(OAc)2–(L1)], the reaction proceeds in the stepwise Michael–Mannich reaction to give the exo′ adducts as stable isomers (see scheme).
BENZYLIDENE-INDOLINONE COMPOUNDS AND THEIR MEDICAL USE
申请人:GO Mei Lin
公开号:US20130035364A1
公开(公告)日:2013-02-07
Compounds of general formula I:
wherein
R
1a
, R
1b
, R
2
, R
3a
, R
3b
and X are as defined herein are tyrosine kinase inhibitors and are useful for the treatment of various diseases and conditions, for example cancer.
The present invention relates to spiroindolinone derivatives of the formula
and enantiomers and pharmaceutically acceptable salts and esters thereof which have utility as antiproliferative agents, especially, as anticancer agents.
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