查询词典 hydroxy-acetone

The new methods to synthesize 6-hydroxy-3, 8-dioxabicyclo[3.2.1]octane, dihydrobenzofuran and benzofuran derivatives are described in this thesis.

本文主要论述了(5R)-6-羟基-3，8-二氧二环[3.2.1]辛烷，苯并二氢呋喃和苯并呋喃类衍生物的合成新方法。

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用"一勺烩"方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

Hydroxy-2-methyl-1-phenyl propan-1-one (1173) was a more effective photoinitiator to these monomers than that of benzophenone.

与二苯甲酮相比，2-羟基－2-甲基－1-苯基丙酮(1173)对两种单体具有较好的引发效果。

Results Benzyl cinnamate, benzyl benzoate and borneol were found in vitro of rabbits, 2-hydroxy-methyl benzoate and borneol were found in vivo of rabbits.

结果 体外药物成分含有肉桂酸苄醋、苯甲酸苄酯、冰片等；体内药物成分含有2-羟基苯甲酸甲酯、冰片等。

Twenty multiparous and ten primiparous Holstein cows were used to in- vestigate effects of supplementing dairy cow diets with Alimet (DL, 2- hydroxy-4- butanoic acid; HMB; Novus International Inc.) on DMI and milk production.

20多子和10头荷斯坦奶牛初产被用来在， vestigate补充与Alimet（消旋，2奶牛饲料的影响-羟基- 4 -丁酸； HMB；诺弗司国际公司） DMI和牛奶的生产。

In comparison,the rhizobia in mature infected cells were larger,greater in number,varied in shape,and distributed throughout the nodule cells.The rhizobia in the mature cells also had poly-hydroxy butanoic acid and curapos.

成熟侵染细胞中，根瘤菌个体较大，数量较多，多呈棒状，少数为球形或椭球形，有很多根瘤菌还呈现明显的"T"形、"Y"形或"V"形，菌体占满了整个细胞，这时的根瘤菌大多数含有聚羟基丁酸和聚磷酸盐颗粒。

The reaction of calcium L-threonate with hydrogen bromide in acetic acid readily yields (2S, 3S)-2, 4 -dibromo-3 -hydroxy butanoic acid which was further converted into methyl (2s, 3S)-2,4-dibromo-3-hydroxybutanoate by treatment of methanol.

在化合物12上引入氨基甲酰基可用二氯磷异氰酸酯、氯乙酰异氰酸酯或氯磺酰异氰酸酯，随之引入的二氯磷酰基、氯乙酰基或氯磺酰基可分别用碳酸氢钠、N-甲基二硫代氨基甲钠或亚硫酸钠脱去。

Ethyl 4-[(1-hydroxy-1-methyl)ethyl]-2-propyl-1H-imidazole-5-carboxylate,the key intermediate of Olmesartan ,was synthesized from butanoic acid and o-phenylenediamine via condensation under microwave-irradiation,oxidation,esterification and the Gringard reaction.

用正丁酸与邻苯二胺为原料，在微波照射下缩合成2-丙基苯并咪唑，再氧化开环制得2-丙基咪唑二羧酸，再经酯化、Gringard反应制得抗高血压药物奥美沙坦的关键中间体2-丙基-4-[(1-羟基-1-甲基)乙基]-1H-咪唑-5-羧酸乙酯，总收率32.2%。

The invention discloses a strain for generating 3-hydroxy butanone and the application thereof, which belong to the field of bioengineering technology.

本发明属于生物工程技术领域，公开了一种产3-羟基丁酮的菌株及其应用。

An anhydride formed by the removal of a water molecule from the hydroxyl and carboxyl radicals of hydroxy acids.

蒙大纳的干花头制成的药酊，用以减轻挫伤和扭伤引起的疼痛和炎症

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。