Grignard reagents were prepared from the starting materials 1-bromo-3,5-difluorobenzene,1-bromo-2,4-difluorobenzene andbromo-3,4-difluorobenzene respectively,then reacted with diethyl carbonate to form magnesium tris(...Grignard reagents were prepared from the starting materials 1-bromo-3,5-difluorobenzene,1-bromo-2,4-difluorobenzene andbromo-3,4-difluorobenzene respectively,then reacted with diethyl carbonate to form magnesium tris(difluoropheny)methanol,and methacryloyl chloride was added dropwise to abtain tris(difluorophenyl)methyl methacrylates.The target products were synthesized in high overall yield(67～74%)with"one-pot"method.Structures of the compounds were comfirmed by IR,1HNMR,13CNMR and elemental analysis,and methanolysis was also studied.展开更多
trimethyl hexanoic methylester was sythesised by hydroesterfication of branched olefin diisobutylene under mild conditions.With th changes of conditions we achieved rather good yield 78% (yield of 3,5,5 trimethyl hexa...trimethyl hexanoic methylester was sythesised by hydroesterfication of branched olefin diisobutylene under mild conditions.With th changes of conditions we achieved rather good yield 78% (yield of 3,5,5 trimethyl hexanoic methylester) conversation of olefin 85% and good selectivity 93%,the optimum conditions are:reaction time 16h,pressure 8.0MPa,temperature 130℃.展开更多
文摘Grignard reagents were prepared from the starting materials 1-bromo-3,5-difluorobenzene,1-bromo-2,4-difluorobenzene andbromo-3,4-difluorobenzene respectively,then reacted with diethyl carbonate to form magnesium tris(difluoropheny)methanol,and methacryloyl chloride was added dropwise to abtain tris(difluorophenyl)methyl methacrylates.The target products were synthesized in high overall yield(67～74%)with"one-pot"method.Structures of the compounds were comfirmed by IR,1HNMR,13CNMR and elemental analysis,and methanolysis was also studied.
文摘trimethyl hexanoic methylester was sythesised by hydroesterfication of branched olefin diisobutylene under mild conditions.With th changes of conditions we achieved rather good yield 78% (yield of 3,5,5 trimethyl hexanoic methylester) conversation of olefin 85% and good selectivity 93%,the optimum conditions are:reaction time 16h,pressure 8.0MPa,temperature 130℃.
