A stereoselective synthesis of anti-γ,δ-alkynyl- and -alkenyl-β-hydroxy-α-amino esters from tin(<scp>ii</scp>) enolates of glycinate
作者:Jonathan J. Gridley、Michael P. Coogan、David W. Knight、K. M. Abdul Malik、Christopher M. Sharland、Jirada Singkhonrat、Siân Williams
DOI:10.1039/b306291k
日期:——
Condensations between the tin(II) enolate 11 of ethyl N-tosylglycinate and conjugated ynals 12 and ynones 14 are highly diastereoselective, in favour of the anti-isomers 13 and 15; similar reactions of enals and enones 17 show lower but still useful levels of anti-stereoselectivity.