查询词典 acid anhydride

Methods: 2ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2ethyl5nitro aniline. The product was then synthesized to 3methyl6nitro1Hindazole by using ringclosing reaction in the presence of NaNO2, and then ethylated to obtain 2,3diethyl6 nitro2Hindazole. The latter compound was then reduced by SnCl2/Hcl to get target compound 2,3diethyl6nitro2Hindazole.

以2乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2乙基5硝基苯胺，后用亚硝酸钠关环得3甲基6硝基1H吲唑，经硫酸二甲酯甲基化得2，3二甲基6硝基2H吲唑，最后用氯化亚锡将其还原得到目标产物，通过1H NMR确定结构与目标产物一致。

Methods: 2-ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2-ethyl-5-nitro aniline. The product was then synthesized to 3-methyl-6-nitro-lH-indazole by using ring-closing reaction in the presence of NaNO2, and then ethylated to obtain 2, 3-diethyl-6- nitro-2H-indazole. The latter compound was then reduced by SnC12/Hcl to get target compound 2, 3-diethyl-6-nitro-2H-indazole.

以2-乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2-乙基－5-硝基苯胺，后用亚硝酸钠关环得3-甲基－6-硝基－1H-吲唑，经硫酸二甲酯甲基化得2，3-二甲基－6-硝基－2H-吲唑，最后用氯化亚锡将其还原得到目标产物，通过1HNMR确定结构与目标产物一致。

Part I, the Friedel-Crafts acylation on DAA and methyl dehydroabietic acid was carried out with acetyl chloride, benzoyl chloride or phthalic anhydride as acylating regents, anh- ydrous aluminum chloride as catalyst and with different solvents to compare with, we have got t- hree new compounds.

第一部分，分别以脱氢松香酸和脱氢松香酸甲酯为底物，乙酰氯、苯甲酰氯、邻苯二甲酸酐为酰化试剂，无水三氯化铝作催化剂，采用不同的溶剂及反应条件进行傅克酰基化反应，得到3个新化合物。

Acid and anhydride functionalized PP, PE and EVA forms are available.

酸或者酸酐功能化 PP 、 PE 和 EVA 等形式都是有的。

Polyaspartic acid was synthesized using maleic anhydride and ammonium salt as raw materials and characterized by IR and TG-DTA.

以马来酸酐和铵盐为原料合成聚天冬氨酸，对聚天冬氨酸进行了红外光谱和差热-热重分析表征，并对其阻碳酸钙垢及分散氧化铁的性能做了较系统的研究。

Catalytic synthesis of Aspirin over pretreated sodium acetate using salicylic acid and acetic anhydride as starting materials.

以水杨酸和乙酸酐为原料、无水乙酸钠为催化剂合成阿司匹林。

The reaction was carried out under the ratio of ramie to acetic anhydride and acetic acid of 1∶2.5∶4 at 60℃for 1 h.

通过FT-IR、SEM、纯水通量等手段考察了不同种类增塑剂对醋酸纤维素的影响。

An alcohol evaporator for prodaction of acetic acid and acetic anhydride exploded during opera-tion.

一种用于生产醋酸和醋酸酐的酒精蒸发釜在服役中发生了爆炸。

Polyaspartic acid was synthesized with maleic anhydride and salvolatile as raw material by the method of thin layer polymerization.

以马来酸酐和碳酸铵为原料，通过薄层聚合制备了聚天冬氨酸，研究了反应物配比、聚合时间及反应温度等因素对聚合物产率、相对分子质量的影响；考察了聚合物用量及相对分子质量对阻垢性能的影响。

A new preparation method for antimony stearate by antimonous oxide, acetic anhydride and stearic acid was studied.

硬脂酸锑作为一种分子筛催化剂中有毒物质的钝化剂和一种新型的热稳定剂，可用于石油催化裂化、塑料、橡胶工业［1～3］。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。