beta-Laminaribiose octaacetate (2b) was prepared in greater than 50% yield from the microbial polysaccharide curdlan by specific degradation with a yeast cell-wall lytic enzyme preparation, Kitalase,and subsequent acetylation. Acetolysis of curdlan also gave alpha-laminaribiose octaacetate (2a) in 27% yield. The usefulness of these peracetates 2a and 2b as starting materials for organic synthesis was
通过用酵母细胞壁裂解
酶制剂Kitalase进行特异性降解和随后的乙酰化作用,从微
生物多糖凝胶中获得了大于50%收率的β-Laminaribioseoctaacetate(2b)。
乙二醛的乙酰
水解还产生了α-laminaribioseoctaacetate(2a),产率为27%。通过将2b转化为透明质酸的二糖重复单元N-乙酰基透明质酸(23),表明了这些过
乙酸盐2a和2b作为有机合成原料的有用性。转化是通过一系列反应进行的,这些反应包括
葡糖醛衍
生物的
叠氮化和选择性烷基化或直接三苯甲基化以区分存在于二糖中间体中的两个伯羟基。