Synthesis and characterization of 1-O-β-lactosyl-(R,S)-glycerols and 1,3-di-O-β-lactosylglycerol
作者:Lucjan J.J. Hronowski、Walter A. Szarek、George W. Hay、Anita Krebs、William T. Depew
DOI:10.1016/0008-6215(89)84126-6
日期:1989.7
Abstract The synthesis of 1- O -β-lactosyl-( R,S )-glycerols was achieved by three methods: ( a ) in 25% yield by the trimethylsilyl trifluoromethanesulfonate-promoted reaction of octa- O -acetyl-β-lactose ( 11 ) with ∼0.5 mol-equiv. of 2- O -benzylglycerol ( 4 ), ( b ) in ∼34% yield by the coupling of 4 with an equimolar amount of hepta- O -acetyl-α-lactosyl bromide ( 12 ) in the presence of mercury(II)
摘要通过三种方法合成了1- O-β-乳糖基-(R,S)-甘油:(a)通过三甲基甲硅烷基三氟甲磺酸酯促进的八-O-乙酰基-β-乳糖( 11)〜0.5摩尔当量。在氰化汞(II)存在的情况下,通过将4与等摩尔量的七-O-乙酰基-α-乳糖苷溴化物(12)偶合,制得2-O-苄基甘油(4),(b),产率约34% (c)在氰化汞(II)存在下,通过偶合等摩尔量的12和1,2-二-O-苄基-(R,S)-甘油进行偶联,收率约为50%通过去除封闭基团。通过方法(a)通过将11与约0.5摩尔当量的4偶合,以21%的产率制备1,3-二-O-β-乳糖苷甘油,通过将12与约0.5摩尔的偶合,以38%的产率制备1,3-二-O-β-乳糖基甘油。 -equiv。的方法4(b)中,然后去除封闭基团。通过高分辨率的二维1 Hn.mr光谱技术确定了乳糖单元和甘油残基之间糖苷键的构型。