Sugar lactams and lactim ethers, useful precursors of cyclic amidines, from intramolecular nucleophilic displacements
作者:Veronique Moreaux、Heidi Warren、J Michael Williams
DOI:10.1016/s0040-4039(97)00959-3
日期:1997.6
ether. Tetrazole formation without isolation of the intermediate azide was illustrated by the conversion of the aforementioned nitrile sulfonate into the D-talonotetrazole. Cyclic amidines were prepared from the lactam and lactim ether derivatives. The D-allono derivatives were also converted into D-ribono-1,4 lactam and amidine derivatives.
N-芳基-2,3:5,6-二-O-异亚丙基-4-O-甲磺酰基-D-古洛酰胺酰胺的共轭碱的环化,得到D-烯丙内酰胺缩醛。由甲醇钠促进的2,3:5,6-二-O-异亚丙基-4-O-甲磺酰基-D-甘露腈的环化反应得到D-talonolactim醚。通过上述腈磺酸盐向D-talonotetrazole的转化,说明了在不分离中间体叠氮化物的情况下四唑的形成。由内酰胺和内酰胺醚衍生物制备环状。D-allono衍生物也被转化为D-ribono-1,4内酰胺和am衍生物。