192565-61-0Relevant academic research and scientific papers
An air-stable chiral Hf-based catalyst for asymmetric Mannich-type reactions
Kobayashi, Shu,Yazaki, Ryo,Seki, Kazutaka,Ueno, Masaharu
, p. 8425 - 8429 (2008/02/08)
A new class of isolable, air-stable, storable, and Hf-based catalyst has been developed. In the presence of 10 mol % of the powdered Hf catalyst, the asymmetric Mannich-type reactions of imines with silicon enolates derived from esters proceeded smoothly
Remarkably stable chiral zirconium complexes for asymmetric Mannich-type reactions
Saruhashi, Kowichiro,Kobayashi, Shu
, p. 11232 - 11235 (2007/10/03)
Isolable, air-stable, storable, and highly selective chiral zirconium catalysts for asymmetric Mannich-type reactions have been developed. The reactions of imines with silicon enolates proceeded smoothly using 1-10 mol % of the powdered zirconium catalyst
A novel dinuclear chiral niobium complex for Lewis acid catalyzed enantioselective reactions: Design of a tridentate ligand and elucidation of the catalyst structure
Kobayashi, Shu,Arai, Kenzo,Shimizu, Haruka,Ihori, Yoichi,Ishitani, Haruro,Yamashita, Yasuhiro
, p. 761 - 764 (2007/10/03)
Two's company: By using a novel chiral ligand a dinuclear chiral niobium catalyst for highly enantioselective Mannich-type reactions was developed. Tridentate binol derivatives provide excellent asymmetric environments around the niobium atom, and the Man
Air-stable, storable, and highly selective chiral Lewis acid catalyst
Ueno, Masaharu,Ishitani, Haruro,Kobayashi, Shu
, p. 3395 - 3397 (2007/10/03)
(matrix presented) An air-stable storable, and highly selective chiral Lewis acid catalyst for asymmetric Mannich-type reactions has been developed. The catalyst can be stored for more than three months in air at room temperature without loss of activity.
Enantioselective mannich-type reactions using a novel chiral zirconium catalyst for the synthesis of optically active β-amino acid derivatives
Ishitani, Haruro,Ueno, Masaharu,Kobayashi, Shu
, p. 8180 - 8186 (2007/10/03)
Catalytic enantioselective Mannich-type reactions of silyl enol ethers with aldimines have been successfully performed using a novel chiral zirconium catalyst prepared from zirconium(IV) tert-butoxide (Zr(OrBu)4), 2 equiv of (R)-6,6'-dibromo-1,
