45 2 |  | Vol. 45 No. 2 | 2015 4 | Apr 2015 |
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ٙĿtˎgw
4--5-ĺϳо |
~w~Сo_Ŀ犞*
㽭I(y)W(xu) ˎW(xu)Ժ㽭 310014 |
ժҪо^Ёƥ3-λ4--5-1ĺϳɹˇȱͪ2ʼԭ(jng)h(hun)Vilsmeierص߀ԭÓõ4--5-1ʞ58.5%ص߀ԭÓ܄ض嶡ӄa(chn)1 ʵӰó˃(yu)ˇl |
P(gun)I~4--5-^Ёƥص߀ԭÓ嶡 |
ЈD(li)̖TQ463.25īIRaA¾̖1009-9212201502-0023-03 |
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Study on the Synthesis of 4-Methyl-5-formylthiazole |
YE Long-fei, YE Xiao-jing, PAN Zhen-tao, LUO Wen-jun, ZHONG Wei-hui*
(College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China) |
AbstractThe synthesis of 4-methyl-5-formylthiazole(1), a 3-side chain of Cefditoren Pivoxil was studied. Starting from 1-chloropropan-2-one(2)and thiourea, the target product was obtained through following reactions including cyclization, Vilsmeier formylation and diazotization deamination in a total yield of 58.5%. The effects of solvents, temperature, the loading of t-BuONO and DMSO on the yield of the target product were evaluated to obtain the optimized conditions. |
Key words4-methyl-5-formylthiazole; Cefditoren Pivoxil; diazotization deamination; tert-butyl nitrite |
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ĿȻƌW(xu)YĿ21276238
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ߺ(jin)飺~w1988-TʿооˎﻯW(xu)
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(lin) ϵ ˣ犞оˎPgwľGɫϳɷˇоE-mailweihuizhong@zjut.edu.cn
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ոڣ2015-03-12
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