55268-75-2
基本信息
頭孢呋辛酯
呋肟頭孢菌素
頭孢呋新
西力欣
(藥典標(biāo)準(zhǔn)品)
呋肟霉素
(6R,7R)-7-[2-呋喃基(甲氧亞氨基)乙酰氨基]-3-氨基甲酰氧甲基-8-氧代-5-硫雜-1-氮雜二環(huán)[4.2.0]辛-2-烯-2-甲酸
頭孢呋肟
頭孢呋辛
[6R-[6A,7Β(Z)]]-3-[[(氨基羰基)氧]甲基]-7-[[2-呋喃基(甲氧亞氨)乙?;鵠氨基]-8-氧代-5-硫雜-1-氮雜二環(huán)[4.2.0]-2-辛烯-2-羧酸
(6r-(6alpha,7beta(z)))-3-(((aminocarbonyl)oxy)methyl)-7-((2-furanyl(methoxyimino)a cetyl)-amino)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 1-(acetyloxy)ethyl ester
CEFUROXIME 1-ACETOXYETHYL ESTER
CEFUROXIME AXETIL
cefaloxime
cefuroxim
ethyl)-7-((2-furanyl(methyoxyimino)acetyl)amino)-8-oxo-,(6r-(6-alpha,7-beta(z
Cefuroxime VETRANAL
5-Thia-1-azabicyclo4.2.0oct-2-ene-2-carboxylic acid, 3-(aminocarbonyl)oxymethyl-7-(2Z)-2-furanyl(methoxyimino)acetylamino-8-oxo-, (6R,7R)-
5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-[[(aminocarbonyl)oxy]methyl]-7-[[2-furanyl(methoxyimino)acetyl]amino]-8-oxo-, [6R-[6α,7β(Z)]]-
Biofuroksym
Cephuroxime
Ketocef
(6r-(6-alpha,7-beta(zethyl)-7-((2- furanyl(methyoxyimino)acetyl)amino)-8-oxo-
(6R,7R)-3-[[(Aminocarbonyl)oxy]methyl]-7-[[(2E)-2-(2-furanyl)-2-(methoxyimino)-1-oxoethyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
Cefuroxime
Cefuroxime acid
[6R-[6α,7β(Z)]].3-[[(Aminocarbonyl)oxy]methyl]-7-[[2-furanyl(methoxyimino)acetyl]amino]-8-oxo-5-thia-1-azabieyclo[4.2.0]oct-2-ene-2-carboxylic acid
Biocidin
EkLxirrm
物理化學(xué)性質(zhì)
安全數(shù)據(jù)
應(yīng)用領(lǐng)域
制備方法
其中側(cè)鏈的制備及和化合物(IV)的反應(yīng)可進(jìn)行如下。在0℃和攪拌下,往14.99g(0.072mo1)五氯化磷懸浮于150ml干燥的二氯甲烷溶液中,加入27.5mlN,N-二甲基甲酰胺。冷卻至-10℃,再加入12.17g(0.072mo1)2-(呋喃-2-基)-2-甲氧亞氨基乙酸(Ⅸ)。在-I0℃,繼續(xù)攪拌反應(yīng)15min后,加入35g碎冰。在0*C繼續(xù)攪拌10min后,分出下層的二氯甲烷層,留待后用。
75ml N,N-二甲基甲酰胺、75ml乙腈、42rnl三乙胺和(6R,7R)-7-氨基-3-[(氨甲酰氧基)甲基]頭孢-3-烯-4-羧酸混合,攪拌下浸入冰浴中,再加入10ml水。在0~2℃下攪拌45min,直到固體全部溶解,形成黃色的溶液。然后在10min內(nèi),一IO'C和攪拌下,往該黃色溶液中加入上面制得的二氯甲烷溶液,此時(shí)溫度會(huì)緩慢升至0℃。接著在0~2"C下繼續(xù)反應(yīng)1h。移去冷浴,讓其在lh內(nèi)自然升溫至20"C。在5"C下,把該反應(yīng)液慢慢加入l00ml的2mol/L鹽酸和1.15L的冷水所成的溶液中。用2mol/L鹽酸(約10ml)調(diào)節(jié),使該二相混合液的Ph值在2以下,繼續(xù)攪拌,并再冷卻至5℃。析出沉淀,過(guò)濾,用100ml二氯甲烷和250ml水洗,于40℃真空干燥過(guò)夜,得22.04g頭孢呋辛,收率86.6%。
方法2:以7-氨基頭孢烷酸(V)為原料,該法用于大規(guī)模工業(yè)生產(chǎn),更加經(jīng)濟(jì)。V和所需側(cè)鏈在二氯甲烷中反應(yīng),以三乙胺作為縛酸劑,反應(yīng)液用稀鹽酸洗去堿化合物后,用碳酸氫鈉溶液提取,經(jīng)常法處理后得化合物(Ⅵ)。化合物(Ⅵ)用黃色酶(yellow yesst)經(jīng)Rhodidiumtoruloides(粉末狀,可在室溫下貯存)進(jìn)行發(fā)酵,以脫去3位的乙酰基。發(fā)酵液經(jīng)離心分離去酶后,加入酸使化合物(Ⅶ)結(jié)晶出來(lái)。從化合物(Ⅶ)出發(fā),可有三種方法使其轉(zhuǎn)化為頭孢呋辛鈉。先和三氯乙?;惽杷狨?從三氯乙酰胺和草酰氯制備而得)迅速反應(yīng),得到化合物(Ⅷ)后,再和2-乙基己酸鈉在低級(jí)醇或二醇中反應(yīng),頭孢呋辛鈉直接從反應(yīng)液中結(jié)晶析出。先和氯磺?;惽杷狨?從氯化氰和三氧化硫制備而得)迅速反應(yīng),得到化合物(Ⅷ)后,再和乙酸鈉或2-乙基己酸鈉反應(yīng),得頭孢呋辛鈉。先和二氯次磷?;惽杷狨?從氨基甲酸甲酯和五氯化磷制備而得)緩慢反應(yīng),水分解得到二氫次磷?;衔?Ⅷ)后,再在Ph=3.5的水溶液中加熱分解,得到頭孢呋辛,接著和乙酸鈉或2-乙基己酸鈉反應(yīng)得頭孢呋辛鈉。
上下游產(chǎn)品信息
55268-75-2(安全特性,毒性,儲(chǔ)運(yùn))
常見(jiàn)問(wèn)題列表
Cefuroxime is highly active against S. aureus (MIC=0.25 μg/ml), regardless of whether the strains produces a penicillinase. It is against Staphylococcus aureus methicillin susceptible; S. aureus , methicillin resistant, Streptococcus pyogenes , S. pneumoniae , S. viridans , S. faecalis , and Clostridium spp with MIC values of 0.25 μg/ml, 5.9 μg/ml, 0.125 μg/ml, 0.125 μg/ml, 0.125 μg/ml, >125.0 μg/ml, and 1.2 μg/ml, respectively. Cefuroxime (10-100 μg/ml; 2-6 hours) rapidly bactericidal, its action is comparatively slow against the strains of S. aureus , but, even so, over 99% of the initial inoculum is killed by 6 h. The gram-negative organisms are killed rapidly, and in most cases over 99% of the very large inocula are killed within 2 h; the β-lactamase-producing strains are killed as quickly as non-enzyme-producing strains.
Rabbits (weighing 2.0 to 2.5 kg) are challenged intravenously with S. aureus strain 630 (a penicillinase-producing strain), the median effective dose of Cefuroxime is 3 mg/kg as a result of the protection test.