Reactions of carbene intermediates from the reaction of trialkyl phosphites with dialkyl benzoylphosphonates: preparation and reactions of dimethyl 2-(N-tert-butyl-N-methylamino) benzoylphosphonate and dimethyl 2-(methylamino)benzoylphosphonate
作者:D. Vaughan Griffiths、Jayne E. Harris、Belinda J. Whitehead
DOI:10.1039/a701147d
日期:——
Dimethyl 2-(methylamino)benzoylphosphonate has been prepared by the
thermal decomposition of dimethyl
2-(N-tert-butyl-N-methylamino)
benzoylphosphonate formed by the action of triethylamine on
1-tert-butyl-3-(dimethoxyphosphinyl)-1-methyl-2,1-
benzisoxazolinium hexafluorophosphate. The reactions of both
benzoylphosphonates with trimethyl phosphite proceed via
carbene intermediates 4 to initially give ylidic phosphonates 5, which
for 5 (X = 2-MeNH) undergoes cyclisation and rearrangement
to give the novel 2-oxophosphorindoline 11.
2-(甲基氨基)苯甲酰膦酸二甲酯是由三乙胺作用于 1-叔丁基-3-(二甲氧基膦酰基)-1-甲基-2,1-苯并异噁唑啉鎓六氟磷酸盐而形成的 2-(N-叔丁基-N-甲基氨基)苯甲酰膦酸二甲酯经热分解制备而成。这两种苯甲酰基膦酸盐与亚磷酸三甲酯的反应都是通过碳烯中间体 4 进行的,最初得到亚甲基膦酸盐 5,对于 5(X = 2-MeNH)来说,经过环化和重排,得到新型 2-氧代磷吲哚啉 11。