Catalytic efficiency of bases and a Lewis acid for isomerization of galactose into tagatose was comparatively studied. NaH₂PO₄ + Na₂HPO₄ phosphates and Mg-Al hydrotalcite were tested as soluble and solid base catalysts. Selectivity towards tagatose over these base catalysts decreases along with galactose conversion owing to formation of sorbose as a side product. In the presence of the bases, yield of tagatose was limited to 16% obtained at 51% galactose conversion. Sn-BEA zeolite presents a solid Lewis acid. This catalyst enables a selective transformation of galactose giving rise to tagatose in 24% yield at 29% conversion of the substrate.

比较研究了碱和路易斯酸将半乳糖异构化为塔格糖的催化效率。测试了NaH ₂ PO ₄  + Na ₂ HPO ₄磷酸盐和Mg-Al水滑石作为可溶和固体碱催化剂。由于形成副产物山梨糖，与这些半乳糖催化剂相比，对塔格糖的选择性随着半乳糖转化而降低。在碱的存在下，塔格糖的产率限于在51％半乳糖转化率下获得的16％。Sn-BEA沸石呈固体路易斯酸。该催化剂能够选择性转化半乳糖，从而以24％的收率生成塔格糖，而底物的转化率为29％。