Highly efficient and generalized asymmetric synthesis of quaternary stereogenic carbon-containing β-amino indanones/indanoles via Mannich-type additions between 1-indanones and N-tert-butanesulfinylketimines
Sulfinimine-Mediated Asymmetric Synthesis of Acyclic and Cyclic α-Aminophosphonates
作者:Chengye Yuan、Qianyi Chen、Jinfeng Li
DOI:10.1055/s-2008-1067247
日期:2008.9
Nucleophilic addition of dialkylphosphites to N-tert-butanesufinimines proceeds smoothly at room temperature in the presence of potassium carbonate or potassium fluoride, affording acyclic α-alkyl-α-aminophosphonates and a series of cyclic α-aminophosphonates in good chemical yields and modest to high diastereoselectivities.
A New and Convenient Asymmetric Synthesis of α-Amino- and α-Alkyl-α-aminophosphonic Acids Using <i>N</i>-<i>tert</i>-Butylsulfinyl Imines as Chiral Auxiliaries
作者:Chengye Yuan、Qianyi Chen
DOI:10.1055/s-2007-990872
日期:2007.12
successfully at room temperature with potassium carbonate as base to afford α-amino- and α-alkyl-α-amino- N-( TERT-butylsulfinyl)phosphonates in good to excellent chemical yield and diastereoselectivity. The major diastereo-mers were separated and smoothly converted into enantiopure α-amino- and α-alkyl-α-aminophosphonic acids.
Highly efficient and generalized asymmetric synthesis of quaternary stereogenic carbon-containing β-amino indanones/indanoles via Mannich-type additions between 1-indanones and N-tert-butanesulfinylketimines
作者:Lingmin Wu、Chen Xie、Haibo Mei、Vadim A. Soloshonok、Jianlin Han、Yi Pan
DOI:10.1039/c4ob00489b
日期:——
1-Indanone and acetophenone derived enolates undergo Mannich-type reactions with ketimines in up to 98% yields and >99 : 1 diastereoselectivities.