Diastereoselective synthesis of enantioenriched homopropargyl amino alcohols from α-dibenzylamino aldehydes and their use as chiral synthons
作者:José M. Andrés、Rafael Pedrosa、Alfonso Pérez-Encabo、María Ramírez
DOI:10.1016/j.tet.2006.05.060
日期:2006.8
Homochiral α-dibenzylamino aldehydes, prepared from the corresponding α-amino acids, react with propargyl bromide and zinc in DMF/THF (1:1) or DMF/Et2O (1:1) at 20 °C to afford, in good yields and dr, homopropargylic 1,2-amino alcohols. anti Diastereomers were always formed as major products in this reaction. These compounds are versatile intermediates for a variety of synthetic targets: γ-amino-β-hydroxy-ketones
由相应的α-氨基酸制得的手性α-二苄基氨基醛与炔丙基溴和锌在DMF / THF(1:1)或DMF / Et 2 O(1:1)中于20°C反应,得到良好的产生dr和同炔丙基1,2-氨基醇。反非对映异构体始终是该反应的主要产物。这些化合物是多种合成目标的通用中间体:γ-氨基-β-羟基酮,4-氨基-1,3-二醇,1,7-二氨基-2,6-二醇和ω-氨基-δ -羟基酯。