作者:Grzegorz Cholewinski、Jaroslaw Chojnacki、Jerzy Pikies、Janusz Rachon
DOI:10.1039/b907641g
日期:——
2-Amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane reacts with acyl chlorides (4-chlorobenzoyl chloride or pivaloyl chloride) yielding the respective N-acyl selenophosphoramides. These derivatives do not isomerise to the related selenocarbonyl imides. X-ray study of N-(4-chlorobenzoyl)-2-amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane indicates that the selenium atom is placed in the equatorial position. The next compound studied, N-pivaloyl-2-amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane, crystallises with both axial/equatorial conformers present in the asymmetric unit. Finally, 2-amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane is present in the solid state in the form with the selenium atom in the axial position. The results are presented together with X-ray structures of previously synthesised and described cyclic O-acyl monoselenophosphates.
2-Amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane 与酰基氯(4-氯苯甲酰氯或特戊酰氯)反应生成相应的 N-酰基硒磷酰胺。这些衍生物不会异构化成相关的硒羰酰亚胺。对 N-(4-氯苯甲酰基)-2-氨基-2-硒基-5,5-二甲基-1,3,2-二氧磷杂环戊烷的 X 射线研究表明,硒原子位于赤道位置。所研究的下一个化合物 N-特戊酰基-2-氨基-2-硒基-5,5-二甲基-1,3,2-二氧磷杂环戊烷结晶时,不对称单元中同时存在轴向和赤道构象。最后,2-氨基-2-硒基-5,5-二甲基-1,3,2-二氧磷杂环戊烷以硒原子位于轴向位置的形式存在于固态中。研究结果与之前合成和描述的环状 O-酰基单硒磷酸盐的 X 射线结构一起呈现。