preparative TLC. The combined 1H- and 13C-NMR analysis confirmed that the structures of PG1 and PG2 were propyl-α-D-glucopyranoside and propyl-α-D-maltopyranoside, respectively. Both PG1 and PG2 showed emulsification activity and stability in their formation in water and n-hexadecane. Furthermore, the antibacterial activity of both products was determined and it was found that PG2 had a higher antibacterial
烷基糖苷由于其可
生物降解,乳化和抗菌特性,已在许多行业中得到有效使用。在这项研究中,使用β-
环糊精(β-CD)和1-
丙醇通过环回 芽孢杆菌
重组环糊精糖基转移酶(CGTase)的糖基化反应合成了丙基糖苷(
PG n) 的烷基糖苷。A11。合成丙糖苷的最佳条件包括在pH值为10%(v / v)的1-
丙醇中,将1.5%(w / v)β-CD和500 U / mL CGTase孵育6.0,50°C持续96 h。通过TLC在最佳条件下分析产物后,观察到至少三种产物的移动速度快于
葡萄糖。通过质谱分析确定这些转移的产物的分子量为222.1、384.1和546.4道尔顿。这些值分别与丙基
葡糖苷(
PG 1),丙基
麦芽糖苷(
PG 2)和丙基
麦芽三糖苷(
PG 3)一致。
PG 1和
PG 2制备并大规模制备产物,随后通过制备TLC纯化。合并的1 H-和13 C-NMR分析证实,
PG 1和
PG 2的结构分别为丙基-α