(二乙氧基磷酰基甲基)糠酸甲酯在羧基上被乙醇中等摩尔量的氢氧化钾选择性地水解。通过在三乙胺和叠氮化钠的存在下用氯甲酸乙酯连续处理而获得的羧酸转化为呋喃酰叠氮化物。3-氟酰叠氮化物和5-(二乙氧基磷酰基甲基)-2-糠酰叠氮化物在加热至110℃的同时在相应的异氰酸酯中进行库尔修斯重排,其添加甲醇以形成稳定的甲基氨基甲酸酯。4-(二乙氧基磷酰基甲基)-5-甲基-2-呋喃基叠氮化物也形成稳定的异氰酸酯,但是当用甲醇处理该物质时,该过程不会停止形成甲基氨基甲酸酯。发生第二个甲醇分子的添加,随后的亲核取代和氨的消除导致O- [4-(二乙氧基磷酰基甲基)呋喃基-2](甲基)碳酸酯。3-(二乙氧基磷酰基甲基)-2-呋喃基叠氮化物在100℃下在甲苯中形成聚合物,但是在光谱下观察到在1:1的甲苯-甲醇混合物中沸腾时形成氨基甲酸酯。后者化合物也经历转化为磷酸化的碳酸呋喃酯。借助1 H和31 P NMR光谱,追踪
Diethoxyphosphorylmethylfurans in Curtius reaction
作者:L. M. Pevzner
DOI:10.1134/s1070363211010099
日期:2011.1
nucleophilic substitution and elimination of ammonia lead to O-[4-(diethoxyphosphorylmethyl)furyl-2](methyl)carbonate. 3-(Diethoxyphosphorylmethyl)-2-furoyl azide forms polymer at 100°C in toluene, but while boiling it in the 1:1 toluene-methanol mixture formation of urethane is observed spectroscopically. The latter compound also undergoes conversion to phosphorylated furyl carbonate. By means of the 1H and
(二乙氧基磷酰基甲基)糠酸甲酯在羧基上被乙醇中等摩尔量的氢氧化钾选择性地水解。通过在三乙胺和叠氮化钠的存在下用氯甲酸乙酯连续处理而获得的羧酸转化为呋喃酰叠氮化物。3-氟酰叠氮化物和5-(二乙氧基磷酰基甲基)-2-糠酰叠氮化物在加热至110℃的同时在相应的异氰酸酯中进行库尔修斯重排,其添加甲醇以形成稳定的甲基氨基甲酸酯。4-(二乙氧基磷酰基甲基)-5-甲基-2-呋喃基叠氮化物也形成稳定的异氰酸酯,但是当用甲醇处理该物质时,该过程不会停止形成甲基氨基甲酸酯。发生第二个甲醇分子的添加,随后的亲核取代和氨的消除导致O- [4-(二乙氧基磷酰基甲基)呋喃基-2](甲基)碳酸酯。3-(二乙氧基磷酰基甲基)-2-呋喃基叠氮化物在100℃下在甲苯中形成聚合物,但是在光谱下观察到在1:1的甲苯-甲醇混合物中沸腾时形成氨基甲酸酯。后者化合物也经历转化为磷酸化的碳酸呋喃酯。借助1 H和31 P NMR光谱,追踪
Synthesis of phosphonomethylated acid chlorides, alcohols, and aldehydes of the furan series
作者:L. M. Pevzner
DOI:10.1134/s107036321108007x
日期:2011.8
group remains untouched in all these transformations. A series of phosphorylated acid chlorides, alcohols, and aldehydes including all six versions of mutual location of phosphorus-containing substituent and another functional group in the furan ring was synthesized. It is established that 2,3- and 3,2-(diethoxyphosphorylmethyl)(chlorocarbonyl)furans in the course of vacuum distillation undergo cyclization