synthesis of dibrominated 1,5-dioxaspiro[5.5]undecane derivatives bearing substituents in positions 7, 8 or 9, are reported. The structural aspects are investigated by means of NMR methods and by the molecular structure of two compounds established by single-crystal X-ray diffractometry. The data are used to determine the routes followed by the bromination reactions of spiro-1,3-dioxanes and the asymmetric
据报道,作为单前体参与了在位置7、8或9处带有取代基的二
溴1,5-二氧杂螺[5.5]
十一烷衍
生物的非对映选择性合成的前体,单
溴化螺1,3-
二恶烷的合成和立体
化学。通过以下方式研究结构方面核磁共振 方法和通过单晶建立的两种化合物的分子结构 X射线衍射。数据用于确定螺1,3-
二恶烷的
溴化反应以及该方法的立体选择性所涉及的不对称诱导所遵循的途径。