l-Serine was transformed in 8 steps into (4R,5S)-2,2-dimethyl-4-[(Z)-3-pentadecenyl]-1,3-dioxan-5-amine. This chiral ε,ζ-unsaturated amine was subjected to intramolecular aminomercuration and then acid hydrolysis to give (−)-deoxoprosopinine and (−)-deoxoprosophylline.
通过 8 个步骤将 l-
丝氨酸转化为 (4R,5S)-2,2-二甲基-4-[(Z)-3-
十五烯基]-1,3-二氧杂
环戊烷-5-胺。将这种手性ε,ζ-不饱和胺进行分子内
氨基巯基化,然后进行酸
水解,得到(-)-脱氧rosopinine 和(-)-脱氧rosophylline。