The addition of dimethylphosphonate to six 5,6-dideoxy-6-nitro-D-hex-5-enofuranoses at 25 °C in the presence of triethylamine preponderantly gave (5R)-adducts, whereas the same reaction at 100 °C without a base yielded (5S)-adducts as the main products.
在三乙胺存在下,在 25 °C 下将膦酸二甲酯添加到六个 5,6-二脱氧-6-硝基-D-己基-5-烯呋喃糖中,主要产生 (5R)-加合物,而在 100 °C 下的反应相同a 碱以 (5S)-加合物为主要产物。