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Synthesis of Chlorosulfonyl-containing Pyrazolone Azo Compounds with Thionyl Chloride-DMF System 被引量:3
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作者 汤立军 张淑芬 +2 位作者 崔志华 杨锦宗 高文涛 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第5期719-722,共4页
Chlorosulfonyl-containing pyrazolone azo compounds (2a, 2b) have been prepared by reaction of the corresponding sodium sulfonate (1a, 1b) with thionyl chloride in the presence of a catalytic quantity of N,Ndimethylfor... Chlorosulfonyl-containing pyrazolone azo compounds (2a, 2b) have been prepared by reaction of the corresponding sodium sulfonate (1a, 1b) with thionyl chloride in the presence of a catalytic quantity of N,Ndimethylformamide in dry benzene. The effects of reaction temperature, time, catalyst and solvent amount on the yield of 2a and 2b were investigated. The results show that chlorination of 1a and 1b under optimal conditions gives 2a and 2b in 95.5% and 99.2% yield respectively. The given method is facile and suitable for large-scale synthesis. 展开更多
关键词 azo compounds thionyl chloride CHLORINATION PYRAZOLONE SYNTHESIS
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Iodine catalyzed efficient synthesis of symmetrical diaryl sulfoxides from arenes and thionyl chloride under solvent-free conditions 被引量:2
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作者 Hong She Wang Jun E. Zeng 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第12期1447-1450,共4页
Synthesis of symmetrical diaryl sulfoxides from arenes and thionyl chloride in the presence of a catalytic amount of iodine at room temperature under solvent-free conditions is described. Mild reaction conditions, eas... Synthesis of symmetrical diaryl sulfoxides from arenes and thionyl chloride in the presence of a catalytic amount of iodine at room temperature under solvent-free conditions is described. Mild reaction conditions, easy workup, high yield, and easily available catalyst are important features of this method. 展开更多
关键词 Aryl sulfoxides ARENES thionyl chloride
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PREPARATION OF POLY (LACTIC ACID)THROUGH THIONYL CHLORIDE ACTIVATED POLYCONDENSATION
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作者 WANG Zheng LULinhua +1 位作者 ZHAO Xueming YAO Kangde 《Chinese Journal of Reactive Polymers》 2000年第2期156-163,共8页
A two-step process was used to synthesize the high molecular weight poly (lactic acid) using thionyl chloride as an activator for the polycondensation of prepolymer of lactic acid. The products were characterized by G... A two-step process was used to synthesize the high molecular weight poly (lactic acid) using thionyl chloride as an activator for the polycondensation of prepolymer of lactic acid. The products were characterized by GPC, DSC, and 1H-NMR. Poly (L-lactic acid) (PLLA) with molecular weight Mw: 32875 was obtained when thionyl chloride was used, while low molecular weight PLLA Mw: 7350 was yielded without thionyl chloride. Effects of the concentration of thionyl chloride, polymerization time and bases on the molecular weight of poly (lactic acid) were investigated. In DSC scans the glass transition temperatures (Tg) of the resulting polymers varied from 25.3 to 57.6℃, and the Tg of poly(L-lactic acid) was higher than that of poly (D,L-lactic acid) (PDLLA). The melting points of poly (L-lactic acid) and poly (D, L-lactic acid) could not be found unless the polymers were obtained by thionyl chloride activator. 展开更多
关键词 Poly (lactic acid) thionyl chloride POLYCONDENSATION
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Bioinformatics Analysis of 4-hydroxy-3-methyl-2-buten1yl diphosphate synthase(HDS) in Populus trichocarpa
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作者 刘立辉 李成浩 +1 位作者 杨静莉 夏德安 《Agricultural Science & Technology》 CAS 2012年第1期1-3,28,共4页
[Objective] This study aimed to analyze the deprotection of acetyl group on amino group. [Method] A simple, convenient one-pot amino protection group of amide removed by thionyl chloride and pyridine via efficient chl... [Objective] This study aimed to analyze the deprotection of acetyl group on amino group. [Method] A simple, convenient one-pot amino protection group of amide removed by thionyl chloride and pyridine via efficient chlorination and hydroly- sis with 1, 2-dichloroethane as solvent at ambient temperature has been developed. [Result] Pyridine is crucial to the reaction; the best solvent is 1, 2-dichloroethane, and the most suitable reaction temperature is the ambient temperature; in addition, the yield is the highest as the molar ratio of pyridine to N-(4-bromophenyl) ac- etamide is 1:1. [Conclusion] The significant features of this protocol include short re- action time, cleaner reaction profiles, under mild reaction conditions and easy purifi- cation, and simple workup that precludes the use of toxic solvents. 展开更多
关键词 DEPROTECTION thionyl chloride Pyridine AMIDES Acetyl group
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