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1)  spectromatic analysis
箭根酮内酯A
2)  prioketolactone
红根草酮内酯
1.
They were established as two new diterpenoids, prioketolactone ( 1 ), neoprionitone ( 2 ) and a known diterpenquinone, dihy-droisotanshinone(3)by spectral analysis.
由红根草(Salvia prionitis Hance)中分得三个abietane类二萜成分:红根草酮内酯(prioketolactone,1)、新红根草酮(neoprionitone,2)和二氢异丹参酮1(dihydroisotanshinone1,3)。
3)  ketolide
酮内酯
1.
Studies on the synthetic procedure of a novel ketolide,cethromycin;
新型酮内酯赛红霉素的合成研究
2.
The Studies on Synthesis of Telithromycin and the Novel Ketolide Compounds, the Determination of Their Antibacterial Activities and the Study on Structure-activity Relationships;
大环内酯类抗生素Telithromycin与酮内酯新化合物的合成、抗菌活性测定及构效关系研究
3.
A new process for preparation the ketolide antibiotic telithromycin by multistep reactions started from clarithromycin is reported.
以克拉霉素为原料,经多步反应制得酮内酯类抗生素泰利霉素。
4)  Ketolides
酮内酯
1.
A Brief Introduction on Macrolides Antibiotics of Novel Generation Ketolides;
新一代大环内酯类抗生素——酮内酯类简介
2.
The novel generation macrolide erythromycin derivatives have shown the improved pharmacokinetics profiles and the high activity against resistant strains,in which ketolides are the representative compounds,thus become the development emphasis for macrolide antibiotics.
以酮内酯为代表的新一代大环内酯类红霉素衍生物具有良好的药动学性质,且对耐药菌有很好的活性,成为近年来大环内酯类抗生素研发的重点。
3.
According to the SAR study of ketolides and the bio-isostere principle,a new type of ketolide(1),bearing a C12 pyrazolinonyl moeity instead of the C11,12 cyclic carbamate group in telithromycin,was designed and synthesized starting from clarithromycin derivatives.
根据酮内酯的构效关系和生物电子等排原理,设计、合成了新型C12吡唑啉酮酮内酯(1)。
5)  ketolides
酮内酯类
1.
Telithromycin is the first member of a new family of the macrolide lincosamide streptogramin B class of antimicrobials,the ketolides.
泰利霉素是大环内酯 林可酰胺 链阳霉素B新家族中的第一个抗菌药物 ,属酮内酯类抗生素 ,具有广谱抗菌活性和较低的选择性耐药性 ,以及与其他酮内酯类抗生素的交叉耐药性。
6)  ketolide
酮内酯类
1.
Study on relationship between thioesterase domain and synthesis of ketolide;
硫酯酶结构域对酮内酯类化合物合成的影响
2.
Since the formation of C-3 ketone group of macrolactone ring depended on the ketoreductase (KR) domain of the sixth module of polyketide synthase that catalyzed the synthesis of 6-deoxy-erythronolide B, we could make KR6 domain inactivated or deleted by genetic engineering for ketolide biosynthesis.
利用染色体同源重组技术已构建了一系列糖多孢红霉菌KR6突变体,均合成酮内酯类化合物3-脱氧-3-羰基-6-脱氧-红霉内酯B(3-deoxy-3-oxo-6-deoxy-erythronolide B,DODEB),并进一步被羟基化修饰为3-脱氧-3-羰基-红霉内酯B(3-deoxy-3-oxo-erythronolide B,DOEB),然而产量比较低。
补充资料:-戊内酯、3-甲基丁内酯、咖吗-戊内酯
CAS: 108-29-2
分子式: C5H8O2
分子质量: 100.12
沸点: 207-208℃
熔点: -31-208℃

中文名称: 4-戊内酯、γ-戊内酯、3-甲基丁内酯、咖吗-戊内酯

英文名称: dihydro-5-methyl-2(3H)-Furanone、dihydro-5-methyl-2(3h)-furanon、4-hydroxypentanoic acid lactone、4-hydroxyvaleric acid lactone、4-methyl-gamma-butyrolactone、gamma-methyl-gamma-butyrolactone、gamma-valerolakton

性质描述: 无色至微黄色液体。凝固点-31℃,沸点205-206.5℃,83-84℃(1.73kPa),相对密度(25/25℃)1.0578,折光率(nD25)1.4301。能与水、许多有机溶剂、树脂和蜡等混溶。10%水溶液的pH为4.2。

生产方法: 由不饱和羧酸通过闭环反应来合成,例如乙酰乙酸与硫酸共热,或乙酰丙酸在镍、铜等催化剂存在下加氢。

用途: γ-戊内酯有较强的反应能力,可用作树脂溶剂及各种有关化合物的中间体。也用作润滑剂、增塑剂、非离子型表面活性剂的胶凝剂、加铅汽油的内酯类添加剂,用于纤维素酯和合成纤维的染色。γ-戊内酯具有香兰素和椰子香味。我国GB2760-86规定为允许使用的食用香料。主要用以配制桃、椰子、香草等型香精。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条