Stereocontrol by diethylaluminum chloride in the addition of 2-lithiofuran and N-methyl-2-lithioimidazole to α-alkoxy nitrones. Total synthesis of 5-O-carbamoylpolyoxamic acid.
作者:Alessandro Dondoni、Santiago Franco、Francisco Luis Merchán、Pedro Merino、Tomás Tejero
DOI:10.1016/s0040-4039(00)73939-6
日期:1993.1
derived from D-glyceraldehyde acetonide leads to the corresponding syn-adducts as major products (ds 88–96 %) while the reaction in the presence of Et2AlCl leads to anti isomers (ds 79–95 %); the synthesis of 5-O-carbamoylpolyoxamic acid from 4-O-benzyl-2,3-O-isopropylidene-L-threose via the nitrone-furan adduct is described
在衍生自D-甘油醛丙酮化物的硝酮2中添加标题金属化杂环1会导致相应的正加合物作为主要产物(ds 88–96%),而在Et 2 AlCl存在下的反应会导致反异构体( ds 79–95%);描述了通过硝基-呋喃加合物由4-O-苄基-2,3-O-异亚丙基-L-苏糖合成5-O-氨基甲酰基聚乙酰胺酸