1287715-31-4Relevant articles and documents
A Mannich/cyclization cascade process for the asymmetric synthesis of spirocyclic thioimidazolidineoxindoles
Cai, Hao,Zhou, Yu,Zhang, Dong,Xu, Jinyi,Liu, Hong
, p. 14771 - 14774 (2014)
An asymmetric cascade Mannich/cyclization reaction between 3-isothiocyanato oxindoles and sulfimides using a commercially available organocatalyst has been developed. A wide range of structurally diverse spiro[imidazolidine-4,3′-oxindole] derivatives were
Organocatalytic direct asymmetric aldol reactions of 3-isothiocyanato oxindoles to ketones: Stereocontrolled synthesis of spirooxindoles bearing highly congested contiguous tetrasubstituted stereocenters
Chen, Wen-Bing,Wu, Zhi-Jun,Hu, Jing,Cun, Lin-Feng,Zhang, Xiao-Mei,Yuan, Wei-Cheng
supporting information; experimental part, p. 2472 - 2475 (2011/07/07)
Chemical equations presented. The first example of a direct catalytic asymmetric intermolecular aldol reaction of 3-isothiocyanato oxindoles to simple ketones with bifunctional thiourea-tertiary amine as catalyst is reported. This strategy provides a promising approach for the asymmetric synthesis of a range of enantioenriched spirocyclic oxindoles bearing two highly congested contiguous tetrasubstituted carbon stereocenters. Versatile transformations of the spirocyclic oxindole products into other structurally diverse spirocyclic oxindoles have also been demonstrated.