英语释义

1. a colorless liquid ester with pleasant odor important for its tautomerism [keto form CH3COCH2COOC2H5, enol form CH3C(OH)=CHCOOC2H5] and for the numerous condensations it can undergo

片语

Benzy Acetoacetate乙酰丙酮芐酯

Pentyl Acetoacetate乙酰乙酸3

methyl acetoacetate[有化] 乙酰乙酸甲酯

starch acetoacetate乙酰乙酸淀粉

Isoamyl acetoacetate乙酰乙酸异戊酯

Hexyl Acetoacetate乙酰乙酸正己酯

Propyl Acetoacetate乙酰乙酸正丙酯

Isopropyl acetoacetate乙酰乙酸异丙酯

ethyl acetoacetate[有化] 乙酰乙酸乙酯

Amy Acetoacetate乙酰乙酸正戊酯

Methy Acetoacetate乙酰乙酸甲酯

英汉例句

• fructone was synthesized from ethyl acetoacetate and glycol using activated carbon supported phosphotungstic acid as catalyst.

  以活性炭负载磷钨酸为催化剂合成了苹果酯，确定了反应的最优条件。

• fructone-a and fructone-b was synthesized from ethyl acetoacetate and ethanediol or 1,2-propanediol using ammonium ceric sulfate as catalyst.

  以硫酸高铈铵为催化剂，通过乙酰乙酸乙酯分别与乙二醇和1，2-丙二醇反应合成了苹果酯-a和苹果酯-b，研究了催化剂等有关因素对产品收率的影响。

• results gqd treatment increased the plasma levels of lactate, pyruvate and glycerol in models, but decreased the levels of lipid, acetate, acetoacetate and other metabolites.

  结果葛根芩连汤能够增加模型鼠血浆中乳酸、丙酮酸和甘油的含量，同时下调血浆中脂质、乙酸、乙酰乙酸等代谢物含量。

• benzoyl chloride and ethyl acetoacetate react and hydrolyze in the presence of a catalyst to synthesize ethyl benzoylacltete, yielding 60%, with a purity of more than 98%.

  苯甲酰氯与乙酰乙酸乙酯催化水解合成苯甲酰乙酸乙酯。收率60 ％ ，产品纯度98 ％ 以上。

• the commercial method of methyl acetoacetate is esterification of dietene and methanol in the presence of catalyst, then through fractionation and rectification.

  乙酰乙酸甲酯的工业化生产方法是双乙烯酮与甲醇在催化剂存在下进行酯化反应，再经粗分馏、精馏得成品。

• the synthesis of cilastatin sodium started from ethyl acetoacetate and 1-bromo-5-chloropentane, through 3 steps to produce ethyl 7-chloro-2-oxoheptanoate;

  西司他丁钠的合成以乙酰乙酸乙酯和1-溴-5-氯戊烷为原料，经活性亚甲基烃化、成肟和水解3步反应得7-氯-2-氧庚酸乙酯；

• two ketals were synthesized from ethyl acetoacetate with ethylene glycol and 1,2-propanediol using activated carbon supported i2 (i2/c) as catalysts without solvent under microwave irradiation .

  在微波辐射下，以活性炭负载碘（i2/c）为催化剂，不用溶剂，合成了乙酰乙酸乙酯乙二醇缩酮和乙酰乙酸乙酯1，2-丙二醇缩酮。

• the synthesis of 6-methyluracil from ethyl acetoacetate and urea with peg-400 as phase transfer catalyst was studied.

  研究了聚乙二醇-400为相转移催化剂，乙酰乙酸乙酯和尿素合成6-甲基脲嘧啶的工艺条件。

• the resulted ir spectrum makes it possible to determine the reaction mechanism of ethyl acetoacetate with tetra butyl titanate.

  得到的红外光谱使其决定钛酸四丁酯与乙酰乙酸乙酯的反应历程。

• methods the compound was synthesized through the reaction of cyclization, split, bromination et al and using 1,3-propyl bromide and ethyl acetoacetate as raw materials.

  方法以1，3-溴丙烷与乙酰乙酸乙酯为原料经环合、开环、溴代等反应合成。

• a new process has been developed to synthesize dimethoxy methyl acetoacetate with dimethoxyacetic acid methyl ester and methyl acetate in the presence of sodium methanol.

  以二甲氧基乙酸甲酷和乙酸甲酷为主要原料，经甲醇钠催化制备二甲氧基乙酞乙酸甲醋。

• cefixime open side chain acid was prepared by oximation, etherification, chlorination, ester decomposition using t-butyl acetoacetate as starting material.

  以乙酰乙酸叔丁酯为原料，经过肟化、醚化、氯代酯解反应合成了头孢克肟开环侧链酸。