已经开发出一种在乙腈中使用三甲基氯硅烷/碘化钠进行碳氧键断裂的温和有效的方法。它被应用于非水和中性条件下的合成转化,如缩醛脱保护和从相应的膦酸二烷基酯通过其甲硅烷基酯的甲醇分解合成膦酸。通过 1 H NMR 在乙腈溶液中检测了各种金属碘化物或碘化铵对此类脱烷基作用的有效性。用碘化锂或碘化钾代替碘化钠也获得了令人满意的结果。然而,铜(I)或碘化季铵是无效的。乙腈中的氯三甲基硅烷/溴化锂对多功能膦酸酯或二烷基乙烯基磷酸酯的选择性脱烷基作用有效。
A facile synthesis of α-phosphono esters through methoxycarbonylation of α-phosphono carbanions
作者:Jon K.F. Geirsson、Jon T. Njardarson
DOI:10.1016/0040-4039(94)88430-7
日期:1994.11
This paper describes a concise and effective synthesis of methyl α-phosphonoaryl acetates, effected by reacting α-phosphonocarbanions with methyl chloroformate. Yields are high, and the purification of the products is readily achieved with column chromatography.
Neighbouring phosphonate group participation in carbene chemistry
作者:Hideo Tomioka、Katsuyuki Hirai
DOI:10.1039/c39900001611
日期:——
Systematic studies of the effect of the neighbouringphosphonategroup on the reactivities of carbene showed that the neighbouringphosphonategroup exerts prominent effects on both the product distribution and the reaction products; the results are interpreted as indicating the extent of participation, which seems to be sensitive to the carbenic substituents.
Chemodivergent phosphonylation of diazocarboxylates: light-on vs. light-off reactions
作者:Jalaj Kumar Pathak、Ruchir Kant、Namrata Rastogi
DOI:10.1039/d4ob00573b
日期:——
The reaction between a-diazocarboxylates and trialkylphosphites under thermal and photochemical conditions results into N–P and C–P bond formation, respectively. The diazo substrates act as electrophiles in the former case and as carbene precursors in the later case.