在众多的羟基保护方法中，选择了乙酰氧基对其进行了保护。
We select the acetoxy group to protect the hydroxy group from a great number of the protection methods for the hydroxy group.
最常用的羟基保护基可归纳为三类：酯类、醚类和缩醛或缩酮类。
The hydroxyl groups can be changed into esters, ethers, acetals and ketals, etc.
任意基团在反应步骤完成后可以很容易地除去的基团都适合做羟基保护基团。
Suitable hydroxy-protecting groups are ether-forming groups that can be removed easily after completion of all other reaction steps.
从四氢吡喃醚的合成及脱除方法介绍了二氢吡喃这种羟基保护试剂近十几年来在有机合成中的应用。
As an effective protection for hydroxy group in alcohols and phenols, the methods for the formation of tetrahydropyran ether and its cleavage employed in the last 15 years are reviewed.
叔丁基羟基茴香醚(BHA)和二叔丁基对甲酚(BHT)不仅用于保护食品，还被用来保存化妆品和药品中的油脂。
In addition to preserving foods, BHA and BHT are also used to preserve fats and oils in cosmetics and pharmaceuticals.
研究发现，降低温度是对蔗糖C6位最活泼羟基进行单一选择性保护的有效方法。
The temperature reduction was shown to be an effective method for the most active C 6 hydroxy mono protection.
目的研究人红细胞保护蛋白(HRPRP)在体外对羟基自由基(·oh)的清除作用并探讨其抗氧化机制。
PurposeTo study the removal of hydroxyl radicals (· OH) by human red blood cell protect protein (HRPRP) in vitro.
研究了以甘油、月桂酸为原料，用硼酸保护羟基进行酯化反应合成甘油单月桂酸酯的新方法。
A new synthetic method glyceryl monolaurate(GML) from glycerin and lauric acid via protected hydroxy groups by boric acid was studied.
第二步：2-氨基和一个脂链羟基被保护的更昔洛韦要脱除氨基保护。
Step II: Ganciclovir with a protected 2-amino group and one aliphatic hydroxy group protected is subjected to de-protection of the amino group.
如果用三叔丁基羟基作为氨基保护基团使用，应用酸来将其脱去，如以盐酸和异丙醇为溶剂或无水三氟乙酸。
If the tertiary butyloxycarbonyl group is being used as amino-protecting group, its removal is effected with acid, such as HCl and isopropanol as a solvent or with trifluoroacetic acid neat.
以嫁接在云南黑籽南瓜砧木上的伽师甜瓜为试材，探讨香草酸、香草醛和对-羟基苯甲酸为代表的酚酸类物质对嫁接伽师瓜植株和保护酶活性的影响。
The phenolic acids used were vanillic acid, vanillin and P-hydroxy benzoic acids for studying the effects of phenolic acids on the growth and activities of protective enzymes of muskmelon.
缩合物的酸催化水合后的水解反应在保护剂存在下进行，羟基香茅醛的产率达87.7%。
After acid catalytic dehydration the condensate subsequent hydrolysis was proceeded in the existence of protective agent, the yield of hydroxycitronellal came up to 87.7%.
同时评价了其对羟基自由基介导的2-脱氧核糖裂解的保护作用。
And the scavenging effects of extracts on hydroxyl radical-mediated 2-deoxyribose degradation were studied.
用于合成埃坡霉素及其衍生物并经保护的3，5-二羟基-2，2-二甲基-戊酰胺及其制备方法和应用。
Protected 3,5-dihydroxy-2,2-dimethyl-valeroamides for the synthesis of epothilones and derivatives and process for the production and the use.
以蔗糖为起始原料，经羟基选择性保护、氯化、脱乙酰基等3步化学反应合成三氯蔗糖；
Sugar was as the start material by the reaction of the selective protections at 6-hydroxy, chlorination, deacetyl in three steps obtained the target compound(trichlorosucrose);
本发明涉及一种端双羟基官能化的遥爪聚合物及其制备方法，其特征在于采用了易水 解离去的硅烷保护基团保护的引发剂。
This invention relates to a method for preparing dihydroxyl-terminated telechelic polymer. The method uses an initiator that can be easily hydrolyzed and is protected by silicane protective groups.
目的探讨阿扑吗啡是否对6-羟基多巴胺毁损纹状体帕金森病鼠模型有神经保护作用。
Objective To investigate the possible neuroprotective effect of dopamine(DA) receptor agonist R-apomorphine(R-APO) on the 6-hydroxydopamine(6-OHDA)-induced rat model of Parkinson's disease.
目的探讨阿扑吗啡是否对6-羟基多巴胺毁损纹状体帕金森病鼠模型有神经保护作用。
Objective To investigate the possible neuroprotective effect of dopamine(DA) receptor agonist R-apomorphine(R-APO) on the 6-hydroxydopamine(6-OHDA)-induced rat model of Parkinson's disease.
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