The present paper covers a new process for the synthesis of 1-（2,6,6-trimethyl-1-cyclohexenyl）-3-methyl-2-buten-4-al with dimethyl sulfide, bromomethane and β-ionone as primary materials in four steps, via the carb...The present paper covers a new process for the synthesis of 1-（2,6,6-trimethyl-1-cyclohexenyl）-3-methyl-2-buten-4-al with dimethyl sulfide, bromomethane and β-ionone as primary materials in four steps, via the carbine reaction of dimethyl sulfide and bromomethane, the cyclization of trimethylsulfonium bromide and β-ionone, the opening of epoxy compound and isomerization of C14-aldehyde. The overall yield is 77%. The structure of the titled product was characterized by GC/MS, IR and 1H NMR. The process has many advantages such as facile low-cost materials, high conversion, short reaction time, mild reaction ondition, and less by-products. Furthermore, the part materials can be recycled, the cost and pollution are reduced, so it is feasible for industry production.展开更多
The new room-temperature molten salt was prepared based on LiTFSI[LiNC(SO 2CF 3) 2] with OZO(C 3H 5NO 2) which were not reported in literature. Its thermal and electrochemical properties were studied by differential s...The new room-temperature molten salt was prepared based on LiTFSI[LiNC(SO 2CF 3) 2] with OZO(C 3H 5NO 2) which were not reported in literature. Its thermal and electrochemical properties were studied by differential scanning calorimetry, ac impedance spectroscopy and cyclic voltammertry respectively. The results indicated that the structure symmetry of the molecule was depressed and the extent of charges delocalization was expanded, because of introducing oxygen atom of differential electronegativity in OZO molecule. DSC analysis showed that the LiTFSI-OZO molten salt has the excellent thermal stability and its eutectic temperature is below about 223.15 K. Meanwhile, the conductivity of LiTFSI-OZO molten salt at a molar ratio of 1∶4.5 is 0.75×10 -3 S/cm at 298.15 K and 3.50×10 -3 S/cm at 333.15 K. CV analysis showed that the electrochemical window of the sample is about 4 V.展开更多
文摘The present paper covers a new process for the synthesis of 1-（2,6,6-trimethyl-1-cyclohexenyl）-3-methyl-2-buten-4-al with dimethyl sulfide, bromomethane and β-ionone as primary materials in four steps, via the carbine reaction of dimethyl sulfide and bromomethane, the cyclization of trimethylsulfonium bromide and β-ionone, the opening of epoxy compound and isomerization of C14-aldehyde. The overall yield is 77%. The structure of the titled product was characterized by GC/MS, IR and 1H NMR. The process has many advantages such as facile low-cost materials, high conversion, short reaction time, mild reaction ondition, and less by-products. Furthermore, the part materials can be recycled, the cost and pollution are reduced, so it is feasible for industry production.
文摘The new room-temperature molten salt was prepared based on LiTFSI[LiNC(SO 2CF 3) 2] with OZO(C 3H 5NO 2) which were not reported in literature. Its thermal and electrochemical properties were studied by differential scanning calorimetry, ac impedance spectroscopy and cyclic voltammertry respectively. The results indicated that the structure symmetry of the molecule was depressed and the extent of charges delocalization was expanded, because of introducing oxygen atom of differential electronegativity in OZO molecule. DSC analysis showed that the LiTFSI-OZO molten salt has the excellent thermal stability and its eutectic temperature is below about 223.15 K. Meanwhile, the conductivity of LiTFSI-OZO molten salt at a molar ratio of 1∶4.5 is 0.75×10 -3 S/cm at 298.15 K and 3.50×10 -3 S/cm at 333.15 K. CV analysis showed that the electrochemical window of the sample is about 4 V.
