Synthetic approaches to either homochiral or achiral derivatives of 3-hydroxy-2(5H)-furanone (isotetronic acid)
作者:Joaquim Bigorra、Josep Font、Cristina Ochoa de Echagüen、Rosa M. Ortuño
DOI:10.1016/s0040-4020(01)81841-x
日期:1993.7
Several title compounds were synthesized according to new methods based either on the use of D-ribonolactone as a chiral precursor or on the cyclization of 2,4-dioxopentanoic acid as a suitable achiral precursor. Base-induced elimination and subsequent acid-promoted ring contraction is an efficient protocol for the preparation of isotetronic acids from 2-O-alkyl-3,4-O-benzylidene-D-ribono-1,5-lactone derivatives
根据新方法,基于使用D-核糖内酯作为手性前体或基于2,4-二氧戊烷酸作为合适的非手性前体的环化,合成了几种标题化合物。碱诱导的消除和随后的酸促进的环收缩是从2-O-烷基-3,4-O-亚苄基-D-核糖基-1,5-内酯衍生物制备等渗酸的有效方案。