New Method for the Synthesis of <i>N</i>-<i>tert</i>-Alkoxyarylaminyl Radicals<sup>1</sup>
作者:Yozo Miura、Yoshikazu Muranaka、Yoshio Teki
DOI:10.1021/jo0600959
日期:2006.6.1
after column chromatography. The radical yields depended on the reaction time and the molar ratio of azo compounds to nitroso compounds. In the same manner, acetyl- and cyano-group-carrying N-tert-alkoxyarylaminyls were generated by the reaction of 2-phenyl-4-(4-acetylphenyl)-6-tert-butylnitrosobenzene and 2-phenyl-4-(4-cyanophenyl)-6-tert-butylnitrosobenzene with 5a and 5b, and they were isolated as
2,4-二芳基-6-叔丁基亚硝基苯与2,2'-偶氮二[2-(甲氧基羰基)丙烷](5a),2,2'-偶氮二(2-氰基-4-甲基戊烷)(5b)),和2,2'-偶氮二(2-氰基-4-甲基-4- methoxypentane)(5C在回流的苯),得到稳定ñ -叔-烷氧基-2,4-二芳基-6-叔-butylphenylaminyls,这是柱色谱法成功分离出自由基晶体,收率为13-52%。自由基产率取决于反应时间和偶氮化合物与亚硝基化合物的摩尔比。以相同的方式,乙酰基-和氰基-基团的携带ñ -叔-烷氧基芳基芳基是通过2-苯基-4-(4-乙酰苯基)-6-叔丁基亚硝基苯与2-苯基-4-(4-氰基苯基)-6-叔丁基亚硝基苯与5a和5b反应生成的,它们被分离为自由基晶体。对两个自由基进行了X射线晶体学分析,并详细讨论了它们的分子结构。在1.8-300 K的温度范围内用SQUID测量了两个孤立的自由基的磁性能。