Trimethylsilyl ether of tertiary alcohol can be cleaved by using tetra-n-butylan-monium fluoride (TBAF), acidic hydrolysis, basic alcoholysis and and BF3-Et2O. The resultsshow that BF3-Et2O is a highly selective metho...Trimethylsilyl ether of tertiary alcohol can be cleaved by using tetra-n-butylan-monium fluoride (TBAF), acidic hydrolysis, basic alcoholysis and and BF3-Et2O. The resultsshow that BF3-Et2O is a highly selective method, which has not been reported so far.展开更多
Amino-1,1-diferrocenylethanol 2 was prepared by reduction of trimethylsilyl cyanohydrin ether of diferrocenyl ketone. The crystal structure of 2 was further defined by X-ray diffraction.
The addition of difluorocarbene generated from phenyl(trifluoromethyl)mercury and anhydrous sodium iodide,with trimethylsilyl enol ethers derived from cyclohexanone,cycloheptanone, 3-pentanone and acetophenone was des...The addition of difluorocarbene generated from phenyl(trifluoromethyl)mercury and anhydrous sodium iodide,with trimethylsilyl enol ethers derived from cyclohexanone,cycloheptanone, 3-pentanone and acetophenone was described.The corresponding 2,2-difluoro-1-trimethylsilyloxy- cyclopropanes were obtained in good yields.The thermal stability of these cyclopropyl derivatives was affected by the molecular strain and the nature of their substituents.Thus,1-trimethylsilyloxy- cyclopentene reacted with difluorocarbene to give only 2-fluoro-2-cyclohexen-1-one instead of the expected 1-trimethylsilyloxy-6,6-difluorobicyclo[3.1.0]hexane,and a mechanism for its formation was proposed.展开更多
文摘Trimethylsilyl ether of tertiary alcohol can be cleaved by using tetra-n-butylan-monium fluoride (TBAF), acidic hydrolysis, basic alcoholysis and and BF3-Et2O. The resultsshow that BF3-Et2O is a highly selective method, which has not been reported so far.
文摘Amino-1,1-diferrocenylethanol 2 was prepared by reduction of trimethylsilyl cyanohydrin ether of diferrocenyl ketone. The crystal structure of 2 was further defined by X-ray diffraction.
文摘The addition of difluorocarbene generated from phenyl(trifluoromethyl)mercury and anhydrous sodium iodide,with trimethylsilyl enol ethers derived from cyclohexanone,cycloheptanone, 3-pentanone and acetophenone was described.The corresponding 2,2-difluoro-1-trimethylsilyloxy- cyclopropanes were obtained in good yields.The thermal stability of these cyclopropyl derivatives was affected by the molecular strain and the nature of their substituents.Thus,1-trimethylsilyloxy- cyclopentene reacted with difluorocarbene to give only 2-fluoro-2-cyclohexen-1-one instead of the expected 1-trimethylsilyloxy-6,6-difluorobicyclo[3.1.0]hexane,and a mechanism for its formation was proposed.
