Synthesis of a Glucose-Derived Tetrazole as a New ?-Glucosidase Inhibitor. A New Synthesis of 1-Deoxynojirimycin
作者:Philipp Ermert、Andrea Vasella
DOI:10.1002/hlca.19910740839
日期:1991.12.11
The tetrazole 1 is a new β-glucosidase inhibitor (IC50=8·10−5M, Emulsin), obtained (92%) by deprotection of 22, the product of an intramolecular cycloaddition of the azidonitrile 20. This azidonitrile was formed as an intermediate by treating the L-ido-bromide 14 or the L-ido-tosylate 19 with NaN3 at 110–120°. It was isolated in a separate experiment. The yield of 22 from 19 reached 70%; 21 was formed
四唑1是一种新型的β-葡萄糖苷酶抑制剂(IC 50 = 8·10 -5 M,Emulsin),是通过将氮杂腈20的分子内环加成产物22脱保护而获得的(92%)。通过在110–120°的温度下用NaN 3处理L-氨基溴化物14或L-氨基甲苯磺酸盐19,从而形成了叠氮化腈作为中间体。在单独的实验中将其分离出来。从19的22的收率达到70%;副产物21形成(10%)。溴化物14(42%)和碘化物15(30–35%)来自腈13与约2,5-脱水-L-异丁腈16一起形成。35–45%。从18(97%)获得甲苯磺酸酯19。为了获得18,根据Swern将腈13氧化(17,92 %),然后还原(NaBH 4,CeCl 3),得到18和13(92%,18 / 13 93:7)。用LiAlH 4还原四氢吡啶并四唑22,得到83%的哌啶23,将其去保护为(+)-1-脱氧野oji霉素氢乙酸盐(2·AcOH,86%)