1)α-ketoesterα-酮酯
1.The Henry reaction of cyclic α-ketoesters and α-ketoamides was achieved using triethylamine as a promoter.用三乙胺催化环状α-酮酯和α-酮酰胺同硝基甲烷的Henry反应,首次合成了12个多官能团的β-硝基醇,它们的结构用元素分析、红外光谱和核磁共振进行了表征。
2.The recent advancement of the asymmetric addition of organozinc reagents to ketones and α-ketoesters is reviewed according to the type of the chiral ligands, with an emphasis on the introduction of the ligands with high efficiency and high selectivity.按照手性配体的结构类型分类,综述了近年来有机锌试剂对酮、α-酮酯等化合物的不对称加成反应的研究进展,对高效、高选择性的手性配体在该类反应中的应用进行了重点评述。
2)α keto estersα酮酸酯
英文短句/例句
1.The Mechanistic Study in the Asymmetric Direct Aldol Reaction between α-Keto Esters and Acetone联二萘酚衍生的手性二胺催化剂催化的丙酮与α酮酸酯不对称Aldol反应及机理研究
2.The Reaction of Diethylα-chlorohydrocarbonradical phosphonate with Aldehydes and Ketones;α-氯代烃基膦酸二乙酯与醛酮的反应
3.Aldol Reactions of α-Keto Acid Esters and Acetone Catalyzed by Cinchona Alkaloid Derived Primary Amines金鸡纳碱衍生二胺催化丙酮和α-酮酸酯的Aldol反应
4.-ketoglutarate pathwayα－酮戊二酸途径 α
5.-ketoglutarate dehydrogenaseα－酮戊二酸脱氢酶 α
6.Synthesis of Several α-Ketoacids and α-Ketoacids Salts with Hydantoin Method;海因法合成几种α-酮酸及α-酮酸盐
7.Investigation on the Asymmetric Michael Addition Reaction of β, γ-Unsaturated-α-Keto Esters Catalyzed by Chiral Thioureas手性硫脲催化β，γ-不饱和-α-酮酸酯的不对称迈克尔加成反应研究
8.- methylbenzyl acetate醋酸α－甲基苄基酯
9.undecylenyl acetate醋酸十一碳烯酯D-α-
10.Preparation of α-tocopherol and α-tocopheryl Acetate;α-生育酚和α-生育酚醋酸酯的制备
11.Effect of Ethyl Pyruvate on Tumor Necrosis Factor-α and Interferon-1β After Coronary Microembolization in Rats丙酮酸乙酯干预大鼠冠状动脉微栓塞对肿瘤坏死因子α、白细胞介素1β的影响
12.Research in Synthetic Methodologies of Cyclopentenone Esters and α,β-Unsaturated Esters;环戊烯酮酯和α，β-不饱和酯的合成方法研究
13.Study on Synthesis of Methyl α-Naphthylacetate with Phosthotungstic Acid Catalyst;硫酸钛催化合成α-萘乙酸甲酯的研究
14.Synthesis of α-furanacrylic esters by catalysis of ferric sulfate hydrate水合硫酸铁催化合成α-呋喃丙烯酸酯
15.Synthesis of α-Furanacrylic Esters with Monometallic Sodium Orthophosphate as Catalyst磷酸二氢钠催化合成α-呋喃丙烯酸酯
16.Deamination of threonine by the enzyme threonine deaminase produces α-ketobutyrate.苏氨酸被苏氨酸脱氨酶脱氨产生α-酮丁酸。
17.Synthesis and Herbicidal Activity of α-Phenylsulfonylcyclododecanone Oxime Estersα-苯磺酰基环十二酮肟酯的合成及其除草活性
18.Synthesis of Methyl Propionate from Dimethyl Carbonate and 3-Pentanone over Solid Base Catalyst固体碱催化碳酸二甲酯和3-戊酮合成丙酸甲酯
相关短句/例句
α keto estersα酮酸酯
3)α-amino-β-keto-estersα-氨基-β-酮酸酯
1.The syntheses of α-amino-β-keto-esters (β-oxo dipeptides) were studied.对α-氨基-β-酮酸酯(β-含氧二肽)的合成进行了探讨。
4)α,β-unsaturated ketones and estersα,β-不饱和酮、酯
1.Treatment of the polymer-supported α-phenylseleno ketones and esters prepared from polymer-supported selenium bromide with ketone and ester enolates with hydrogen peroxide afford α,β-unsaturated ketones and esters in good yields and high purities (>95%) without further purification.酮或酯在-78℃经二异丙基胺基锂(LDA)作用形成相应的烯醇式氧负离子,烯醇式氧负离子再与聚苯乙烯负载硒溴反应得到聚苯乙烯负载α-硒基酮或酯;常温下将该负载型的α-硒基酮或酯用过量的30%双氧水处理制得相应的α,β-不饱和酮、酯。
5)α-ketoimine esterα-酮亚胺基酯
1.Derivatives of chiral 1,2-diphenyl-2-aminoalcohol were first used to promoting diethylzinc addition to α-ketoimine esters to obtain chiral non-natural α-amino esters(1,4-addition products) in the highest yield of 67% with 44%e.首次以手性1,2-二苯基-2-氨基乙醇衍生物为配体实现了乙基锌对α-酮亚胺基酯的不对称加成反应,合成了手性非天然α-氨基酸酯(1,4-加成产物),最高收率67%,最高对映选择性44%。
6)β-Substitutedα-Ketoesterβ-取代的α-酮酯
延伸阅读
α,α,α,α',α',α'-六氯对二甲苯分子式：C8H4Cl6分子量：312.84CAS号：68-36-0性质：白色针状或粉末状结晶。熔点108-110℃。溶于二甲苯、石油醚、乙醇、植物油，不溶于水。无味，有特殊臭味，遇光、碱会缓慢分解而呈酸性。制备方法：以混二甲苯为原料，先用98%硫酸磺化，使间二甲苯生成间二甲苯磺酸盐。从磺化反应物中分离出含邻、对二甲苯的油层，水洗、干燥，减压蒸馏出邻、对二甲苯。间二甲苯磺酸盐经水解可得副产品间二甲苯。由邻、对二甲苯经氯化即得1，4-双（三氯甲基）苯：在反应锅中投入邻、对二甲苯，再加入过氧化苯甲酰和三乙醇胺。加热到70℃后，在光照射下导入氯气，于70-80℃反应6h，再升温至100-120℃继续反应，至反应液相对密度达到1.560-1.580（65℃），即为反应终点，停止通氯，减压脱除余氯。降温至5℃，过滤，洗涤得粗品，重结晶，活性炭脱色得成品。用途：抗血吸虫病药物。对肝吸虫病、阿米巴原虫病、疟疾以及肠道线虫有一定疗效。但对神经系统的不良反应较多见，且延迟反应持续较久。
