1,3-Dipolar cycloadditions of 9-diazofluorenes and diphenyldiazomethane to 2-acyl-2<i>H</i>-1,2,3-diazaphospholes
作者:Xiangyun Guo、Li Feng、Quanrui Wang、Zhiming Li、Fenggang Tao
DOI:10.1002/jhet.5570430215
日期:2006.3
3-dipole, yielding the respective bicyclic phosphiranes 5 or trimers 7 depending on the reaction conditions employed. The reaction is believed to proceed via the formation of the [3+2]-cycloaddition adducts followed by elimination of nitrogen from the cyclic azo moiety. In the case of 3c, the phosphatetraazabicyclooctadiene compound 6 has been isolated with no loss of nitrogen. Likewise, the dipolar cycloaddition
一系列2-酰基-2 H -1,2,3-二氮杂磷3进行了现成的1,3-偶极环加成反应,并以9-重氮芴作为1,3-偶极,产生了相应的双环膦5或三聚体7,具体取决于使用的反应条件。据信该反应通过形成[3 + 2]-环加成加合物,然后从环状偶氮部分消除氮来进行。在3c的情况下,已分离出了磷酸三氮杂双环辛二烯化合物6,而没有氮的损失。同样,二苯基重氮甲烷与> C的偶极环加成反应P-部分作为1,3-双极性亲和剂,以32-68%的产率提供了phosphadiazabicyclocyclohexenes 8。