Bromamine-T as an efficient amine source for Sharpless asymmetric aminohydroxylation of olefins
作者:Arun Jyoti Borah、Prodeep Phukan
DOI:10.1016/j.tetlet.2013.12.002
日期:2014.1
Asymmetricaminohydroxylation of various olefins was carried out using bromamine-T as nitrogensource in the presence of (DHQ)2PHAL ligand. The newnitrogensource has been found to be effective in terms of yield and reaction time. The optical purities of the products could be obtained with up to 99% ee.
1,3-Dipolar Cycloadditions of Carbonyl Ylides to Aldimines: Scope, Limitations and Asymmetric Cycloadditions
作者:Staffan Torssell、Peter Somfai
DOI:10.1002/adsc.200600324
日期:2006.11
The development of a diastereoselective 1,3-dipolarcycloaddition of carbonylylides and imines for the synthesis of α-hydroxy-β-amino esters is described. The methodology is successfully applied to chiral α-methylbenzylimines affording enantiomerically pure syn-β-amino alcohols, which is exemplified with a short asymmetric synthesis of the paclitaxel side-chain. The use of chiral Rh(II) carboxylate