<scp>d</scp>-Gulonolactone as a Synthon for <scp>l</scp>-Noviose: First Preparation of 4-<i>O</i>-Demethyl-<scp>l</scp>-noviofuranose and Related Derivatives
作者:Marjan Ješelnik、Ivan Leban、Slovenko Polanc、Marijan Kočevar
DOI:10.1021/ol034796t
日期:2003.7.1
D-Gulonolactone was initially converted in a few steps to the key ester derivative 7 [1-O-benzyl methyl 2,3-O-(1-methylethylidene)-alpha-L-lyxofuranosiduronate]. An appropriate selection of protecting groups enabled transformation of 7 under mild reaction conditions to 4-O-demethyl-L-noviofuranose 9a and related 9b-c. Derivatives 9 were further converted either to L-lyxopyranoses (10a and 10b) or to
[反应:见正文]提出了新生物素的糖部分L-新葡聚糖(11)的新合成方法。D-古洛内酯最初在几个步骤中转化为关键酯衍生物7 [1-O-苄基甲基2,3-O-(1-甲基乙叉基)-α-L-呋喃呋喃二糖醛酸酯]。适当地选择保护基使得在温和的反应条件下7可以转化为4-O-脱甲基-L-新呋喃糖9a和相关的9b-c。衍生物9进一步转化为L-lyxopyranoses(10a和10b)或甲基L-lyx呋喃糖苷12。