Intramolecular cycloaddition of α-allyloxycarbonylnitrone bearing a chiral sugar auxiliary: A short-step synthesis of the N-terminal amino acid component of nikkomycin Bz
作者:Osamu Tamura、Naka Mita、Noriko Kusaka、Hirohide Suzuki、Masanori Sakamoto
DOI:10.1016/s0040-4039(96)02317-9
日期:1997.1
caused tandem nitrone formation, transesterification, E,Z-isomerization and diastereofacial selective intramolecular cycloaddition to provide stereocontrolled polycyclic compounds in one step. This method could be applied efficiently to synthesis of the N-terminal amino acid component of nikkomycin Bz.
用乙醛酸半缩醛加热2,3:5,6 - O-二环己叉基-L-果糖肟,然后在催化量的四氯化钛和分子筛4A的存在下用烯丙醇处理所得混合物,从而形成串联硝酮,酯交换反应,E,Z异构化和非对面选择性分子内环加成反应可在一个步骤中提供立体控制的多环化合物。该方法可有效地应用于尼克霉素Bz的N末端氨基酸组分的合成。