Total Synthesis of Several Monodeoxy and Dideoxy-<scp>DL</scp>-hexopyranoses from 6,8-Dioxabicyclo[3.2.1]oct-2-ene and 6,8-Dioxabicyclo[3.2.1]oct-3-ene
作者:T. P. Murray、U. P. Singh、R. K. Brown
DOI:10.1139/v71-345
日期:1971.6.15
Reaction of osmic acid with 6,8-dioxabicyclo[3.2.1]oct-3-ene (1) gave 1,6-anhydro-4-deoxy-β-DL-ribo-hexopyranose (3, R = H) which was hydrolyzed to 4-deoxy-α,β-DL-ribo-hexopyranose (4, R = H). Conversion of 1 to 1,6:2,3-dianhydro-4-deoxy-β-DL-ribo-hexopyranose (5) followed by treatment of 5 with lithium aluminum hydride, gave 1,6-anhydro-3,4-dideoxy-β-DL-erythro-hexopyranose (6, R = H), and this in
锇酸与 6,8-dioxabicyclo[3.2.1]oct-3-ene (1) 反应得到 1,6-anhydro-4-deoxy-β-DL-ribo-hexopyranose (3, R = H)水解为 4-脱氧-α,β-DL-核糖-吡喃己糖 (4, R = H)。1 转化为 1,6:2,3-二脱水-4-脱氧-β-DL-核糖-吡喃己糖 (5),然后用氢化铝锂处理 5,得到 1,6-脱水-3,4-二脱氧-β-DL-赤型-吡喃己糖 (6, R = H),然后将其水解为 3,4-二脱氧-α,β-DL-赤型-吡喃己糖 (7, R = H)。锇酸的反应与 6,8-dioxabicyclo[3.2.1]oct-2-ene (2) 生成 1,6-anhydro-2-deoxy-β-DL-riob-hexopyranose (8, R = H),将其水解为 2 -脱氧-DL-riob-吡喃己糖(9,R =