Synthesis of α,α-trehalose 2,3- and 2,3′-diesters with palmitic and stearic acid: potential immunoreactants for the serodiagnosis of tuberculosis
作者:Hans H. Baer、Xinfu Wu
DOI:10.1016/0008-6215(93)87014-j
日期:1993.1
Abstract Regioselective monoacylation, by the stannylation method, of 4,6:4′,6′-di- O -benzylidene-α,α-trehalose with palmitoyl or stearoyl chloride afforded the 2-palmitate and 2-stearate of the diacetal, whereas partial diacylation led to the corresponding 2,3′-dipalmitate and 2,3′-distearate. Protection of the monoesters in the 2′,3′ positions by cyclizing silylation with 1,3-dichloro-1,1,3,3-t
摘要采用三甲基锡烷基化方法,通过棕榈酰或硬脂酰氯对4,6:4',6'-二-O-亚苄基-α,α-海藻糖进行区域选择性单酰化,得到二缩醛的2-棕榈酸酯和2-硬脂酸酯。部分二酰基化导致相应的2,3′-二棕榈酸酯和2,3′-硬脂酸酯。通过用1,3-二氯-1,1,3,3-四异丙基二硅氧烷进行甲硅烷基化来保护2',3'位的单酯,然后对甲硅烷基醚进行酰化,得到完全保护的2,3-二棕榈酸酯, 2,3-硬脂酸酯和2-棕榈酸酯-3-硬脂酸酯。在这些反应中还产生了少量的其他异构体和三酯。二酯的去甲硅烷基化和脱苄基化最终提供了2,3-和2,3'-二-O-棕榈酰-,2,3-和2,3'-二-O-硬脂酰-和2-O-棕榈酰-3 -O-硬脂酰-α,α-海藻糖。