查询词典 oxo acid

The new compound,2- oxo-propionic acid p-carboxylphenyl hydrazone,was synthesized by the condensation reaction of 2- oxo-propionic acid and p-carboxylphenyl hydrazine which was prepared from p-aminobenzoic acid by diazotization and reduction.

以对氨基苯甲酸为原料，经过重氮化反应和还原反应，合成了对羧基苯肼(2)；2与2-羰基丙酸缩合得到新化合物2-羰基丙酸缩对羧基苯腙，其结构经UV，荧光光谱，1H NMR，13C NMR，IR和元素分析表征。

They are 4-(2- hydroxy-3-butynlenoxy) benzoic acid (1, WA), 5-chloro-7, 8-dihydroxy-7-methyl- 6-oxo-3- [ -3, 4-dihydroxy-3, 5-dimethyl-l-heptylene] -1H-8, 8a-dihydrobenzo [2, 3-c] pyran (2, WB),-2-(2-methyl-2-dibutene diamido)-2-butenoic acid (3, B5262), 3, 4-dihydro-9, 10-dihydroxy-7-methoxy-3-methyl-1H-naphtho [2, 3- c] pyran-1-one (4, A73 semi-Vioxanthin), 8, 8'-bis (6, 9-dioxo-3,4-dihydro-10- hydroxy-7-methoxy-3-methyl-1H-naphtho [2, 3-c] pyran-1-one)(5, A122 Xanthomegnin), 2, 5-dioxo-3a-hydroxymethyl-3, 3a, 6, 6a-tetrahydro-furo [2, 3-b] furan (6, 1003-2), 7-acety1-5-chloro-6, 8-dioxo-7-methyl-3- [ -3, 5-dimethyl-1, 3- diheptylene] -4aH-benzo [2, 3-c] pyran (7, M2-2 sclerotiorin), respectively.

它们分别被命名为4-（2-羟基-3-丁炔氧基）苯甲酸（1，WA）、5-氯-7，8-二羟基-7-甲基-6-氧代-3-[-3，4-二羟基-3，5-二甲基-1-庚烯基]-1H-8，8a-二氢苯并[2，3-c]吡喃（2，WB）、-2-（2-甲基-2-丁烯二酰亚胺基）-2-丁烯酸（3，B5262）、3，4-氢-9，10-二羟基-7-甲氧基-3-甲基-1H-萘并［2，3-c］吡喃-1-酮（semi-Vioxanthin，4，A73）、8，8'-双（6，9-二氧代-3，4-二氢-10-羟基-7-甲氧基-3-甲基-1H-萘并［2，3-c］吡喃-1-酮）（Xanthomegnin，5，A122）、2，5-二氧代-3a-羟甲基-3，3a，6，6a-四氢-呋喃并［2，3-b］呋喃（6，1003-2），7-乙酰基-5-氯-6，8-二氧代-7-甲基-3-［-3，5-二甲基-1，3-庚二烯基］-4aH-苯并2，3-c］吡喃（Sclerotiorin，7，M2-2）。

This invention is directed to the-tartaric acid salt of 2-amino-N-{1-(2,4-difluoro-benzyloxymethyl)-2-oxo-2-3-oxo-3a-pyridin-2-ylmethyl-2-(2,2,2-trifluoroethyl-2,3,3a, 4,6,7-hexahydro-pyrazolo(4,3-c) pyridin-5-yl-ethyl}-2-methyl-propionamide which is a growth hormone secretagogue and as such is useful for increasing the level of endogenous growth hormone.

本发明涉及2－氨基－N－{1－－(2，4－二氟－卞氧甲基)－2－氧代－2－3－氧代－3a－(R－吡啶－2－基甲基－2－(2，2，2－三氟－乙基)－2，3，3a，4，6，7－六氢化－吡唑子基(4，3－c)吡啶－5－基－乙基}－2－甲基－丙酰胺的－－酒石酸盐，它是一种生长激素促分泌素，并且可用于提高内源性生长激素水平。

Optimal process conditions for preparing 2-oxo-1, 4-piperazine diacetic acid(3-KP): 2-oxo-1-piperazine acetic acid was combined with chloroacetic acid at a mole ratio of 1 to 1.1, at temperature 40℃for 8 hours.

通过单因素分析，合成3-KP 的最佳反应条件为：反应温度为40℃，反应时间为8 小时，氯乙酸∶S-KP 的摩尔比为1.1∶1。

Optimal process conditions for preparing 2-oxo-1-piperazine acetic acid: N,N'-ethylenediamine diacetic acid with hydrochloric acid at a mole ratio of 1 to 2.6 ,was cyclized to form 2-oxo-1-piperazine acetic acid by refluxing for 8 hours.

通过单因素分析，合成S-KP 的最佳反应条件为：在沸腾状态下，回流8小时，HCl∶S-EDDA 的摩尔比为2.6∶1。

Trisodium salt of N,N,N'-ethylenediamine triacetic acid was prepared by hydrolyzing 2-oxo-1, 4-piperazine diacetic acid(3-KP) in the strong base solution. Then it was combined with lauroyl chloride, hexadecanoyl chloride and benzoyl chloride respectively. N-lauroyl-ED3A and N-hexadecanoyl-ED3A were prepared in succsess. The molecular structure of N-lauroyl-ED3A was characterized by ~1HNMR and ~(13)CNMR. The molecular structure of N-hexadecanoyl-ED3A was characterized by 1HNMR.

将3-KP 在强碱性条件下水解，生成ED3ANa3 的水溶液，然后分别与月桂酰氯、棕榈酰氯和苯甲酰氯反应，成功制得N—月桂酰基ED3A 和N—棕榈酰基ED3A，并用~1HNMR 和~(13)CNMR 对N—月桂酰基ED3A 的分子结构进行了表征，用1HNMR 对N—棕榈酰基ED3A 的分子结构进行了表征。

N,N'-ethylenediamine diacetic acid was prepared by condensation of ethylenediamine, formaldehyde and potassium cyanide. Then 2-oxo-1-piperazine acetic acid was prepared from N,N'-ethylenediamine diacetic acid. In addition, 2-oxo-1, 4-piperazine diacetic acid(3-KP) was prepared from 2-oxo-1-piperazine acetic acid with chloroacetic acid.

本文用乙二胺、甲醛和氰化钾合成了N，N′—乙二胺二乙酸，然后由N，N′—乙二胺二乙酸合成了2—氧—1—哌嗪乙酸，再由2—氧—1—哌嗪乙酸和氯乙酸合成了2—氧—1，4—哌嗪二乙酸(3-KP)。

Ethyl alcohol, 3-methyl-4-oxo- pentanoic acid, acetic acid butyl ester, 2-methyl-butanoic acid ethyl ester, diethyl phthalate,-2,4-Decadienal were the same volatiles d from the 10 cultivars.

其中共有组6种，为乙醇、3-甲基-4-羰基戊酸、乙酸丁酯、2-甲基丁酸乙酯、邻苯二甲酸二乙酯、-2，4-癸二烯醛。

Propionic acid is an important chemical raw materials, due to the lack of domestic technology, the paper is to study low, High activity of ethanol Oxo acid catalyst.

丙酸是一种重要的化工原料，由于国内技术的欠缺，本文旨在研究低要求、高活性的乙醇羰基合成丙酸催化剂。

ABSTRACT: In the presence of sodium t-butoxide and DMSO,ethyl 2-oxocyclopentanecarboxylate was subjected to C-alkylation with 2-(4-bromomethylphenyl)propanoic acid with high regioselectivity to give 2-［4-(1-ethoxycarbonyl-2-oxo-1-cyclopentanylmethyl)phenyl］propanoic acid (4) which was followed by hydrolysis,decarboxylation and salt formation to afford loxoprofen sodium in about 72% overall yield.

在叔丁醇钠和二甲基亚砜的存在下，2-丙酸对2-乙氧羰基环戊酮进行C-烷基化，再经水解脱羧，成盐即得洛索洛芬钠，以2-丙酸计算，总收率为72%。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。