Utilization of 2,4-Di-<i>t</i>-butyl-6-(methoxymethyl)phenyl as a New Sterically Protecting Group
作者:Masaaki Yoshifuji、Kazunori Kamijo、Kozo Toyota
DOI:10.1246/bcsj.66.3440
日期:1993.11
A sterically hindered bromobenzene, 2-bromo-1,5-di-t-butyl-3-(methoxymethyl)benzene, was prepared and converted to the corresponding phosphonous dichloride. The dichloride was then utilized to stabilize a low-coordinate phosphorus compound such as 1-[2,4-di-t-butyl-6-(methoxymethyl)phenyl]-2-(2,4,6-tri-t-butylphenyl)diphosphene. Furthermore, the dichloride gave a cyclization product 1-chloro-2,1-oxaphosphaindan with elimination of chloromethane on standing at room temperature.
制备了一种立体受阻的溴苯,即 2-溴-1,5-二叔丁基-3-(甲氧基甲基)苯,并将其转化为相应的二氯化磷。然后利用这种二氯化物来稳定低配位磷化合物,如 1-[2,4-二叔丁基-6-(甲氧基甲基)苯基]-2-(2,4,6-三叔丁基苯基)二磷烷。此外,该二氯化物在室温下静置时会生成环化产物 1-氯-2,1-氧磷茚,并消除氯甲烷。