A mild and simple method for the synthesis of dialkyl chlorophosphates is described, bis（trichloromethyl） carbonate （BTC） is used as the effective reagent for the conversion of dialkyl phosphites to their correspo...A mild and simple method for the synthesis of dialkyl chlorophosphates is described, bis（trichloromethyl） carbonate （BTC） is used as the effective reagent for the conversion of dialkyl phosphites to their corresponding dialkyl chlorophosphates under mild conditions.展开更多
A series of（Z）-2-chloro-1,3-diarylpropen-1-ones were unexpectedly synthesized in moderate yields by treatment of easily available 2,3-epoxy-1,3-diarylpropan-1-ones with Vilsmeier reagent,which was derived from bis（...A series of（Z）-2-chloro-1,3-diarylpropen-1-ones were unexpectedly synthesized in moderate yields by treatment of easily available 2,3-epoxy-1,3-diarylpropan-1-ones with Vilsmeier reagent,which was derived from bis（trichloromethyl） carbonate（BTC, triphosgene） and DMF.A possible mechanism was also proposed,where sequential ring-opening,halogenation and elimination reactions were involved.展开更多
Thifensulfuron was synthesized in two steps by reacting bis(trichloromethyl)carbonate(BTC) as a phosgene substitute with 2 methoxycarbonyl 3 aminosulfonylthiophene(AST) to give an intermediate sulfonylisocynate, which...Thifensulfuron was synthesized in two steps by reacting bis(trichloromethyl)carbonate(BTC) as a phosgene substitute with 2 methoxycarbonyl 3 aminosulfonylthiophene(AST) to give an intermediate sulfonylisocynate, which reacted with 2 amino 4 methoxy 6 methyl 1,3,5 triazine to give thifensulfuron. The optimum reaction conditions were n (AST)∶ n (BTC)=1∶0 56, reaction temperature 120～130 ℃ and reaction time (11±0 5) h. The purity of thifensulfuron obtained was 96 5%(HPLC) in overall yield 93%.展开更多
基金the National Basic Research Program of China 973 Program(No.2003CB114400)the National Natural Science Foundation of China(No.20476098)for financial support.(No.20676123)
文摘A mild and simple method for the synthesis of dialkyl chlorophosphates is described, bis（trichloromethyl） carbonate （BTC） is used as the effective reagent for the conversion of dialkyl phosphites to their corresponding dialkyl chlorophosphates under mild conditions.
基金the National Natural Science Foundation of China(Nos.20806073 and 20876147)the National Key Technology Research and Development Program(No.2007BAI34B06) for financial support
文摘A series of（Z）-2-chloro-1,3-diarylpropen-1-ones were unexpectedly synthesized in moderate yields by treatment of easily available 2,3-epoxy-1,3-diarylpropan-1-ones with Vilsmeier reagent,which was derived from bis（trichloromethyl） carbonate（BTC, triphosgene） and DMF.A possible mechanism was also proposed,where sequential ring-opening,halogenation and elimination reactions were involved.
文摘Thifensulfuron was synthesized in two steps by reacting bis(trichloromethyl)carbonate(BTC) as a phosgene substitute with 2 methoxycarbonyl 3 aminosulfonylthiophene(AST) to give an intermediate sulfonylisocynate, which reacted with 2 amino 4 methoxy 6 methyl 1,3,5 triazine to give thifensulfuron. The optimum reaction conditions were n (AST)∶ n (BTC)=1∶0 56, reaction temperature 120～130 ℃ and reaction time (11±0 5) h. The purity of thifensulfuron obtained was 96 5%(HPLC) in overall yield 93%.
