Magnesium bromide-promoted addition of heterosubstituted methylketene silyl acetals to alkoxy aldehydes. Diastereoselective synthesis of 3,4-syn-2-methylene- and 2-(alkoxymethyl)-3-hydroxy-4-alkoxy esters
Lewis acid promoted aldol additions of α-thiosilylketeneacetals to α-alkoxy aldehydes: diastereoselective synthesis of -α-methylene-β-hydroxy-∂-alkoxy esters.
MgBr2 mediated addition of Methyl α-methylthio propionate silylketene acetal to α and α,β-alkoxy aldehydes is highly 3,4 syn-selective (18:1). syn-α- methylene-β- hydroxy-∂-alkoxy esters (6) and (8) are synthesized.
Drewes, Siegfried E.; Manickum, Thavrin; Roos, Gregory H. P., Synthetic Communications, 1988, vol. 18, # 10, p. 1065 - 1070
作者:Drewes, Siegfried E.、Manickum, Thavrin、Roos, Gregory H. P.
DOI:——
日期:——
First 1,3-dipolar cycloaddition of Z-α-phenyl-N-methylnitrone with allylic fluorides: a stereoselective route to enantiopure fluorine-containing isoxazolidines and amino polyols
作者:Luca Bernardi、Bianca F. Bonini、Mauro Comes-Franchini、Mariafrancesca Fochi、Mahena Folegatti、Stefano Grilli、Andrea Mazzanti、Alfredo Ricci
DOI:10.1016/j.tetasy.2003.11.008
日期:2004.1
Enantiopure fluorinated isoxazolidines and amino polyols were obtained from the 1,3-dipolar cycloaddition of allylic fluorides and Z-alpha-phenyl-N-methylnitrone under environment-friendly conditions. (C) 2003 Elsevier Ltd. All right reserved.