查询词典 diacetate

We developed a simple and efficient method for the synthesis of benzimidazole derivatives in water. Imidazolium salt grafted iodobenzene diacetate containing double features of ionic liquid and iodobenzene diacetate was synthesized.

报道了一种简便高效的苯并咪唑类衍生物的水相合成新方法，合成了兼具离子液体和二醋酸碘苯双重特点的咪唑盐二醋酸碘苯。

The reaction processes of preparing sodium diacetate from acetic acid and sodium carbonate are studied.

本文对乙酸—纯碱法制备双乙酸钠反应过程进行了研究。

The results indicated that they all had certain effect, but potassium sorbate and sodium diacetate were better than others.

结果表明，山梨酸钾、苯甲酸钠、丙酸钠、丙酸钙和双乙酸钠对湿米粉都有一定的保鲜效果，其中山梨酸钾和双乙酸钠保鲜效果较好。

Crystalline structure and thermal property of cellulose triacetate and cellulose diacetate were studied.

研究三醋酸纤维素和二醋酸纤维素的结晶结构和热学性能。

The results showed that all of the four preservatives can prevent the growth of bacteroidal soft rot, and the effect of sodium diacetate was the best. After 40 or 45 days' storage, all of the untreated asparagus were rotting, but the incidence of disease of the asparagus treated with 1.5% sodium diacetate was 0 and 32% respectively. 0.5% Zhongshengjunsu, 1.5% sodium diacetate and 1% sodium chloride can delay the reduce of chlorophyll.

结果表明，4种防腐保鲜液浸蘸笋尖均可明显地抑制贮藏过程中芦笋软腐病的发生，但以双乙酸钠处理效果最好，贮藏至40d\45d，对照已全部发病，而用1.5%双乙酸钠处理的，发病率为0和32%。0.5%中生菌素、1.5%的双乙酸钠和1%氯化钠处理，均有延缓芦笋叶绿素分解的作用。

In this thesis, two series compounds of thiadiazole (2a~2f) and benzothiazole (5a~5f) were synthesized by using the reagent of iodobenzene diacetate. We also bound the iodobenzene diacetate reagent to the resin and applied it to synthesize thiadiazole and benzothiazole compounds.

本文利用二醋酸碘苯试剂分别与1-芳甲酰基-5-芳基-2-硫代缩二脲及1-芳甲酰基-3-芳基硫脲反应合成了噻二唑(2a~2f)和苯并噻唑(5a~5i)两个系列的杂环衍生物，并通过把二醋酸碘苯负载在高分子上合成了一类新型的固相氧化剂，同时考查了该固相氧化剂在噻二唑，苯并噻唑类化合物合成中的应用以及该固相氧化剂的循环使用。

When test temperature is 40 C and 50 C (60 C is permissible, in such a case, it shall be recorded) multifibre cloth No.1 containing wool, silk and diacetate or multifibre cloth No.2 containing wool and diacetate shall be used.

测试温度是40 C和50 （ 60 C是允许的，在这种情况下，应作相应的记录），多纤维布一号含有羊毛，丝绸和双乙酸钠或多种纤维布二号含有羊毛和双乙酸钠应用。

Chapter 6: Iodobenzene diacetate-mediated reactions of methylenecyclopropanes, vinylidenecyclopropanes and a methylenecyclobutane with phthalhydrazine give the corresponding [3+2] cycloaddition products in good yields under mild conditions. In these reactions, phthalhydrazine was transformed to a 1,3-dipole intermediate in the presence of iodobenzene diacetate. A plausible reaction mechanism has been proposed.

本论文对亚甲基环丙烷类化合物的一些化学反应性能进行了研究，发现了亚甲基环丙烷类化合物在不同试剂或不同催化剂作用下的一些新的化学转化并合成了一些结构简单但具有潜在应用价值的有机小分子。

Thus,α,β-unsaturated ketones were prepared by base-catalized aldol condensation between substituted arylaldehydes and acetones. Using iodosobenzene diacetate as oxidants, the resulting α,β-unsaturated ketones will be transformed to β,γ-unsaturated carboxylic acid esters.

以不同取代的芳香醛跟丙酮缩合后可以得到α，β-不饱和酮，再用iodosobenzene diacetate做氧化剂氧化，可以成左卤o到β，γ-不饱和碳酸酯类化合物。

Firstly, phenyliodine diacetate was immobilized to the 2% cross-linked polystyrene or the liner polystyrene resin. The more iodine the resin had, the lower conversion to phenyliodine diacetate. We made our endeavor to extend the range of useful application of polystyrene supported phenyliodine diacetate in organic synthesis:(1) the reagent was used as an effective reagent of carbonyl regeneration from oximes and semicarbazones of ketones.(2) the reagent was also applied to the synthesis of 1, 3, 4-oxadiazoles, 1, 3-disubstituted-2-pyrazoline, 2-arylbenzoxazole from aldehyde N-acylhydrazones, aldehyde hydoazones and phenolic Schiff's bases respectively.

首先，我们以2％交联的聚苯乙烯和线性的聚苯乙烯树脂为载体，制备了聚合物负载的二醋酸碘苯，通过研究发现：(1)聚苯乙烯二醋酸碘苯是酮肟、缩氨脲有效的去保护试剂，不仅芳香酮，脂肪酮和α，β不饱和酮的肟、缩氨脲也能顺利转化为相应的酮，实现酮基的再生；(2)我们还利用此试剂，分别与醛的N-酰基苯、N-酰基苯腙及邻羟基芳亚胺反应，在温和的条件下发生成环反应，以良好的产率生成1，3，4-噁二唑、吡唑啉和二取代苯并噁唑等杂环化合物；(3)聚苯乙烯二醋酸碘苯还可有效地将邻羟基芳酮的酰腙经氧化、重排成1，2-二酰基苯。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。