The reaction of D-penicillamine and benzaldehyde yielded 2-phenyl-5,5-dimethylthiazolidine-4-carboxylic acid. The structure was determined by single crystal X-ray diffraction. Crystals were monoclinic, P21, a = 9.785(2), b = 6.941(1), c = 10.399(2) A, β = 114.06(3)°, Z = 2. Intensities were measured on a Rigaku AFC6R diffractometer with Cu Kα radiation and 1881 reflections were used to determine the
D-青霉胺与
苯甲醛反应生成2-苯基-
5,5-二甲基噻唑烷-4-羧酸。通过单晶X射线衍射确定结构。晶体为单斜晶系,P21,a = 9.785(2),b = 6.941(1),c = 10.399(2) A,β = 114.06(3)°,Z = 2。强度是在 Rigaku AFC6R 衍射仪上用 Cu 测量的使用 Kα 辐射和 1881 反射来确定结构。R = 0.076,wR = 0.048。该化合物以 2S,4S 构型的
氨基酸形式存在。
噻唑烷环的构象由分子间氢键决定。键长和角度是正常的。1H和13C NMR谱表明差向异构发生在d4-CH3OH溶液中,室温下2S,4S非对映体与2R,4S非对映体的比例为65:35。