10-Chloro-10, 9-(epoxyalkano)selenoxanthenes (12, 14-17) were prepared by the reaction of 9-(hydroxyalkyl)-selenoxanthenes (4, 9-11) with N-chlorosuccinimide, and 1-chloro-1-phenyl-3H-2, 1-benzoxaselenoles (32-34) were similarly synthesized. The selenurane structure of 14 was established by X-ray analysis. The proton nuclear magnetic resonance and electron impact mass spectral data supported the selenurane structures of these compounds. Reactions of the selenurane 16 with sodium acetylacetonide gave a selenoxantheniomethanide derivative 37. Thermal reaction of 14 provided 9-(1-chloro-2-hydroxyethylidene)selenoxanthene (41) together with 9-(2-hydroxyethyl)selenoxanthene (9), while thermal reaction in ethanol produced 9-(1-chloro-2-hydroxyethyl)-9-ethoxyselenoxanthene (42). On the other hand, the benzoxaselenole selenurane (32) was heated at 195-200°C to afford 2-(phenylseleno)benzyl chloride (45), 2-(phenylseleno)benzyl 2-(phenylseleno)benzoate (46) and 2-(phenylseleno)benzaldehyde (28).
10-
氯-10、9-(环氧烷基)
硒氧
蒽(12、14-17)是由 9-(羟基烷基)
硒氧
蒽(4、9-11)与 N-
氯代丁二
酰亚胺反应制备的,1-
氯-1-苯基-3H-2、1-苯并氧杂
硒烯(32-34)也是类似合成的。通过 X 射线分析确定了 14 的
硒脲结构。质子核磁共振和电子碰撞质谱数据支持了这些化合物的
硒脲结构。
硒脲 16 与
乙酰丙酮钠反应生成了
硒氧杂蒽甲烷衍
生物 37。14 的热反应生成了 9-(1-
氯-2-羟乙基)
硒氧
蒽 (41) 和 9-(2-羟乙基)
硒氧
蒽 (9),而在
乙醇中的热反应生成了 9-(1-
氯-2-羟乙基)-9-乙氧基
硒氧
蒽 (42)。另一方面,在 195-200°C 的温度下加热苯并噁
硒醚
硒脲 (32),可以得到 2-(苯基
硒)苄基
氯 (45)、2-(苯基
硒)苄基 2-(苯基
硒)
苯甲酸酯 (46) 和 2-(苯基
硒)
苯甲醛 (28)。