Syntheses of 2-Unsubstituted 1<i>H</i>-1,3-Benzazaphospholes from<i>N</i>-Formyl-2-bromoanilides
作者:Mohammed Ghalib、Basit Niaz、Peter G. Jones、Joachim W. Heinicke
DOI:10.1002/hc.21111
日期:2013.11
The phosphonylation of 2-bromo-formylanilides 1 with triethyl phosphite in the presence of preformed Pd(0)(triethyl phosphite)n catalyst furnished 2-phosphono-formanilides 2 in good yields. Reduction with excess LiAlH4 provided mainly N-methyl-2-phosphinoanilines 3 and minor amounts of 1,2-unsubstituted benzazaphospholes 4. N-Methyl-1,3-benzazaphospholes 5 were synthesized by the cyclocondensation