作者:Pier Luigi Barili、Giancarlo Berti、Felicia D'Andrea、Valeria Di Bussolo、Ilaria Granucci
DOI:10.1016/s0040-4020(01)88219-3
日期:1992.1
1,5-Anhydro-d-galactitol, easily available from d-galactose, was selectively protected in positions 2, 3 and 4 and converted into 5-O-acetyl-2,6-anhydro-3-deoxyl-threo-hex-2-enonic acid methyl ester, which, on reaction with MCPBA in acetic acid gave 2,5-di-O-acetyl-α-l-lyxo-hex-2-ulopyranosonic acid methyl ester. Reaction of the latter with sodium methoxide produced sodium l-ascorbate in high yield
可以容易地从d-半乳糖获得的1,5-脱水-d-半乳糖醇在2、3和4位被选择性地保护,并转化为5 - O-乙酰基-2,6-脱水3-脱氧-苏式-hex- 2-烯酸甲酯,在乙酸中与MCPBA反应后,得到2,5-二-O-乙酰基-α -1- lyxo -hex-2-ulyryranosonic酸甲酯。后者与甲醇钠反应以高产率产生1-抗坏血酸钠。还讨论了几种副反应和某些中间体的构象。