1951 年 71 巻 6 号 p. 612-613
By the combination of d-tartaric acid with dl-threo-1-p-nitrophenyl-2-amino-1, 3-propanediol in water or methanol, its tartrate insoluble in water was collected. This salt was freed by alkalis to d-(-)-threo-1-p-nitrophenyl-2-amino-1, 3-propanediol, and acylated by dichloroacetic anhydride or dichloroacetic acid to optically active chloramphenicol.