and p-nitrobenzaldehyde were prepared and acetylated to give corresponding oxazolidine derivatives, which failed to hydrolyze under Kunz’s conditions. Infrared and ultraviolet absorption spectra of some of these compounds were observed. Acetylated derivatives failed to show the characteristic absorption of (Remark: Graphics omitted.) bond in the 1660–1610 cm−1 region. 4) DL-Chloramphenicol was synthesiz
1) 用雷尼
镍催化剂还原 Erlenmeyer β-苯基
丝氨酸乙酯,得到 DL-threo-1-phenyl-2-benzylideneamino-1, 3-propanediol(一种席夫碱)作为主要产物。通过其红外和紫外吸收光谱证明了该结构。2) 发现 DL-threo-1-phenyl-2-benzylideneamino-1, 3-propanediol 在用
乙酸酐乙酰化后得到 DL-threo-N-acetyl-2-phenyl-4-(α-hydroxybenzyl) oxazolidine。3) DL-threo-1-phenyl-2-amino-1, 3-propanediol 和 DL-threo-1-p-nitrophenyl-2-amino-1, 3-propanediol 与
苯甲醛的缩合产物,o-, m - 和
对硝基苯甲醛被制备并乙酰化得到相应的
恶唑烷衍
生物,其在昆茨