48 1 |  | Vol. 48 No. 1 | 2018 2 | Feb 2018 |
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ٙĿtˎgw
8-(li)ĺϳо |
־*OV
ϹI(y)W(xu) W(xu)ch(hun)W(xu)Ժ 450001 |
ժҪԲAԭϳgw7-y^(gu)7-c-ʻl(f)ɻȡõ4N8-(li)YM(jn)˱˴܄wϵضȵ،a(chn)ƷʵӰ(yu)l飺y20%n7-n^(gu)⛣= 1.02.0܄棯ˮض100(yu)lĿ˻1 Ŀʞ54.5%~59.2% |
P(gun)I~8-(li)A13--7--8-S-ʻ |
ЈD(li)̖TQ464īIRaA¾̖1009-9212201802-0035-03 |
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Synthesis of 8- Substituted Acyl Caffeine Analogues |
GUO Sheng-li, LI Zhi-cheng*, SUN Gang-chun
(College of Chemistry, Chemical and Environmental Engineering, Henan University of Techonology, Zhengzhou 450001, China) |
Abstract1,3-Dimethyl-7-alkylxanthine was prepared from theophylline and alkyl bromide. Using AgNO3 as catalyst and K2S2O8 as oxidant, 8-substituted acyl caffeine analogues were synthesized via free radical reaction between 1,3-dimethyl-7-alkylxanthine and -oxo carboxylic acid. Their structures were characterized using 1H NMR and 13C NMR. The factors influencing the yield of the reaction were studied. The optimum reaction conditions were as following: the amount of catalyst of 20%, 1.02.0 as the ratio of n(7-butyl caffeine)/n(K2S2O8), a mixture of CH3CN and H2O as reaction solvent and reaction temperature of 100. The total yield of the target product was up to 54.5%~59.2%. |
Key words8-substituted acyl caffeine analogue; theophylline; 1,3-dimethyl-7-butyl-8-acetylxanthine; -oxo carboxylic acid |
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ĿȻƌW(xu)Ŀ21302042ʡƼP(gun)ӋĿ162102210040
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ߺ(jin)飺1993-Ϝ(yng)TʿоҪЙCϳˎϳ
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(lin) ϵ ˣ־TʿҪЙCϳˎϳɣE-mailzzlzc@163.com
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ոڣ2018-02-10
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