Under N\-2 atmosphere and at room temperature, the reaction of diaryl diselenid（1\^0 mmol） with terminal alkynes（2\^2 mmol） catalyzed by cesium hydroxy gave exclusively （Z）-1,2-bis（arylseleno）-1-alkenes, but u...Under N\-2 atmosphere and at room temperature, the reaction of diaryl diselenid（1\^0 mmol） with terminal alkynes（2\^2 mmol） catalyzed by cesium hydroxy gave exclusively （Z）-1,2-bis（arylseleno）-1-alkenes, but under air and at -100 ℃, the reaction gave alkyne selenides in 83%95% yields based on the selenium atoms. The method for the preparation of alkyne selenides has advantages of available starting materials and simple procedures. The reaction mechanism was proposed.展开更多
N 1-（2-Fursnidyl）-5-fluorouracil reacted with multimethylenes chlorohydrin in the presence of NaHCO3 in acetonitrile at 80 ℃ to give N 1-（2-furanidyl）-N 3-（hydroxyalkyl）-5-fulorouracils in a high yield （≥93%...N 1-（2-Fursnidyl）-5-fluorouracil reacted with multimethylenes chlorohydrin in the presence of NaHCO3 in acetonitrile at 80 ℃ to give N 1-（2-furanidyl）-N 3-（hydroxyalkyl）-5-fulorouracils in a high yield （≥93%）. Their cyclic glycerophospholipid conjugates were synthesized and had a good activity against the man urinary bladder cancer cell in vitro.展开更多
The reduction of diaryldiselenides by Cp2TiCl2/BuiMgBr/THF led to arylselenium complex of titanocene [Cp2TiSeAr]. This species reacted smoothly with electrophilic substrates such as acylhalides, α-bromocarbonyl compo...The reduction of diaryldiselenides by Cp2TiCl2/BuiMgBr/THF led to arylselenium complex of titanocene [Cp2TiSeAr]. This species reacted smoothly with electrophilic substrates such as acylhalides, α-bromocarbonyl compounds, diaryliodonium salts, α,β-unsaturated carbonyl compounds to afford the corresponding organic selenides in high yields.展开更多
文摘Under N\-2 atmosphere and at room temperature, the reaction of diaryl diselenid（1\^0 mmol） with terminal alkynes（2\^2 mmol） catalyzed by cesium hydroxy gave exclusively （Z）-1,2-bis（arylseleno）-1-alkenes, but under air and at -100 ℃, the reaction gave alkyne selenides in 83%95% yields based on the selenium atoms. The method for the preparation of alkyne selenides has advantages of available starting materials and simple procedures. The reaction mechanism was proposed.
文摘N 1-（2-Fursnidyl）-5-fluorouracil reacted with multimethylenes chlorohydrin in the presence of NaHCO3 in acetonitrile at 80 ℃ to give N 1-（2-furanidyl）-N 3-（hydroxyalkyl）-5-fulorouracils in a high yield （≥93%）. Their cyclic glycerophospholipid conjugates were synthesized and had a good activity against the man urinary bladder cancer cell in vitro.
文摘The reduction of diaryldiselenides by Cp2TiCl2/BuiMgBr/THF led to arylselenium complex of titanocene [Cp2TiSeAr]. This species reacted smoothly with electrophilic substrates such as acylhalides, α-bromocarbonyl compounds, diaryliodonium salts, α,β-unsaturated carbonyl compounds to afford the corresponding organic selenides in high yields.
