945656-60-0Relevant academic research and scientific papers
Enantioselective Synthesis of Chromanones Bearing Quaternary Substituted Stereocenters Catalyzed by (1R)-Camphor-Derived N-Heterocyclic Carbenes
Rafiński, Zbigniew,Kozakiewicz, Anna
, p. 7468 - 7476 (2015/08/18)
A catalytic asymmetric intramolecular crossed-benzoin reaction for the synthesis of chromanones by novel camphor-derived N-heterocyclic carbenes is described. The corresponding chromanones bearing quaternary stereogenic centers were isolated in high yield
Asymmetric synthesis of novel vicinal amino alcohols via intramolecular ketone- N -sulfinylimine pinacol-type reductive coupling promoted by SmI 2
Zhao, Yun-Hui,Liu, Han-Wen
, p. 1012 - 1018 (2014/03/21)
A novel intramolecular asymmetric ketone-N-sulfinylimine pinacol-type reductive coupling reaction induced by SmI2 was reported. A series of 1-amino-1,2,3,4-tetrahydronaphthalen-2-carbinols were obtained in moderate to good yields with excellent
Rh-catalyzed carbonyl hydroacylation: an enantioselective approach to lactones
Shen, Zengming,Khan, Hasan A.,Dong, Vy M.
, p. 2916 - 2917 (2008/10/09)
This communication describes the design and execution of a novel approach to forming chiral lactones via C-H bond activation. The strategy features an unprecedented enantioselective Rh-catalyzed hydroacylation of carbon-oxygen double bonds. Representative keto-aldehydes (derived from salicylaldehyde) undergo cyclization with complete regioselectivity to afford seven-membered lactones in great enantiomeric excess (≥99% ee). The basicity of the phosphine ligand is shown to play a critical role in promoting hydroacylation over competitive decarbonylation. Copyright
D-Camphor-derived triazolium salts for catalytic intramolecular crossed aldehyde-ketone benzoin reactions
Li, Yi,Feng, Zhen,You, Shu-Li
, p. 2263 - 2265 (2008/12/22)
A series of triazolium salts has been synthesized from d-camphor and found to be efficient catalysts for intramolecular crossed aldehyde-ketone benzoin reactions, affording α-ketols bearing a quaternary carbon center with up to 93% ee. The Royal Society o
Modified chiral triazolium salts for enantioselective benzoin cyclization of enolizable keto-aldehydes: Synthesis of (+)-sappanone B
Takikawa, Hiroshi,Suzuki, Keisuke
, p. 2713 - 2716 (2008/02/09)
Equation Presented Asymmetric synthesis of (+)-sappanone B (1), a natural product with a 3-hydroxy chromanone structure, was achieved via enantioselective benzoin cyclization by using a modified Rovis catalyst and triethylamine. This catalyst enabled the
