Conformation inversion of an inositol derivative by use of silyl ethers: a modified route to 3,6-di-O-substituted-l-ido-tetrahydroxyazepane derivatives
作者:Gavin F. Painter、Andrew Falshaw、Herbert Wong
DOI:10.1039/b316506j
日期:——
trans-diaxial 1,6-diol of 3,4-di-O-allyl-2,5-di-O-benzyl-D-chiro-inositol was not cleaved satisfactorily by periodate, but replacement of the allyl substituents with tert-butyldimethylsilyl groups caused conformational inversion of the inositol ring, and the resulting trans-diequatorial 1,6-diol cleaved efficiently to give a dialdehyde from which 3,6-di-O-benzyl-L-ido-tetrahydroxyazepane (2) can be prepared.
在反式二轴1,6-二醇的存在下,用高碘酸根离子选择性裂解2,5-二-O-苄基-D-手性肌醇的反式二甲苯基3,4-二醇,得到二醛(二醛糖),由此制得3,6-二-O-苄基-D-甘露聚糖-四羟基氮杂环庚烷(1)。3,4-二-O-烯丙基-2,5-二-O-苄基-D-手性肌醇的反式二轴1,6-二醇不能令人满意地被高碘酸酯裂解,而是用叔酸取代了烯丙基取代基-丁基二甲基甲硅烷基基团引起肌醇环的构象转化,并且所得到的反式-透明基1,6-二醇被有效裂解成二醛,由此可以得到3,6-二-O-苄基-L-氨基-四羟基氮杂环庚烷(2)准备好了。