Efficient total syntheses of natural pterin glycosides: limipterin and tepidopterin
作者:Tadashi Hanaya、Hiroki Baba、Hiroki Toyota、Hiroshi Yamamoto
DOI:10.1016/j.tet.2007.12.042
日期:2008.2
4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-d-glucopyranosyl bromide in the presence of silver triflate and tetramethylurea, followed by removal of the protecting groups, led to the first selective syntheses of limipterin (3) and tepidopterin (5), respectively.
关键的多功能前体N 2-(N,N-二甲基氨基亚甲基)-1'- O-(4-甲氧基苄基)-3- [2-(4-硝基苯基)乙基]生物蝶呤(29a)及其纤毛蛋白类似物(29b)分别由d-木糖(14步)和l-木糖(11步)制备。在三氟甲磺酸银和四甲基脲的存在下,用3,4,6-三-O-乙酰基-2-脱氧-2-邻苯二甲酰亚胺基-β-d-吡喃葡萄糖基溴化物处理29a和29b,然后除去保护基,导致分别对limipterin(3)和tepidopterin(5)进行首次选择性合成。