β-dicarbontl compound

A new method for the halogenation of 1,3-dicarbonyl compounds;1,3-二羰基化合物的卤代反应的一种新方法H4e汉语字典

Silica supported sodium hydrogen sulfate (NaHSO4?SiO2) has been found to be an efficient het- erogeneous catalyst for the condensation of 1,3-dicarbonyl compounds with primary amines to give the cor- responding β-enamino ketones and esters in good yields at room temperature.NaHSO4·SiO2作催化剂,1,3-二羰基化合物和伯胺在室温下反应合成了一系列β-烯胺酮(酯),该法反应条件温和,产率高,催化剂能回收再利用。H4e汉语字典

A mixture of 1,2-carbonyl compounds(glyoxal trimer dihydrate,diethyl oxalate or benzil) with dimethyl diglycolate is refluxed via condensation for 6～8h in cyclohexane in the presence of KOH,and give furan-2,5-dicarboxylic acid,3,4-dihydroxyfuran-2,5-dicarboxylic acid and 3,4-diphenylfuran-2,5-dicarboxylic acid in the yields of 73.在KOH的作用下,1,2-二羰基化合物二水合三聚乙二醛、草酸二乙酯或二苯乙二酮与二甘醇酸二甲酯在环己烷中回流6～8h,缩合成呋喃-2,5-二甲酸、3,4-二羟基呋喃-2,5-二甲酸和3,4-二苯基呋喃-2,5-二甲酸,产率为73。H4e汉语字典

One-pot condensation of 1,3-dicarbonyl compounds with a range of aldehydes in the presence of ammonium bicarbonate was carried out under solvent-free condition at 70 ℃ to afford 1,4-dihydro- pyridines in 86%～97% yields.碳酸氢铵、醛和1,3-二羰基化合物于70℃无溶剂条件下缩合以86～97%的产率得到1,4-二氢吡啶。H4e汉语字典

A convenient and highly practical procedure for C-alkylation of 1,3-dicarbonyl compounds has been developed involving the use of ionic liquid based on 1-butylpyridinum tetrafluoroborate.以 1 -丁基吡啶四氟硼酸盐为离子液体 ,实现了 1 ,3 -二羰基化合物的烷基化反应 ,提供了一种既方便又实用的操作方H4e汉语字典

Pd/C-Catalyzed α-Oxygenation of 1,3-Dicarbonyl Compounds by OxygenPd/C催化氧气对1,3-二羰基化合物的α-位氧化H4e汉语字典

REACTION OF BIS[1,3-DIPHENYL-2-IMIDAZOLIDINYLIDENE] WITH CARBONYL COMPOUNDS双[1,3-二苯基-2-咪唑叉]和羰基化合物的反应H4e汉语字典

Synthsesis of 2,2-dimethyl-5,5-bis(ethoxycarbonyl)-1,3-dioxane;2,2-二甲基-5,5-二乙氧羰基-1,3-二氧六环的合成H4e汉语字典

Synthesis of (4R,5R)-4,5-Bis(aminomethyl)-1,3-dioxolane(4R,5R)-4,5-双(氨甲基)-1,3-二氧戊环类化合物的合成H4e汉语字典

Selective α-Monobromination of β-Dicarbonyl Compound with [Bmim]Br_3[Bmim]Br_3与β-二羰基化合物的选择性溴化反应研究H4e汉语字典

Synthesis of 2-bromo-2-nitro-1,3-propanediol with KF/Al_2O_3 as CatalystKF/Al_2O_3催化合成2-溴-2-硝基-1,3-丙二醇H4e汉语字典

Synthesis and Crystal Structure of Benzyl-Substituted Tetramethylcyclopentadienyl Dimolybdnum Metal Carbonyl Complex苄基四甲基环戊二烯基钼羰基化合物的合成及晶体结构(英文)H4e汉语字典

Study on the Synthesis and Structures of Substituted Tetramethylcyclopentadienyl Metal Carbonyl Complexes取代四甲基环戊二烯基金属羰基化合物的合成与结构研究H4e汉语字典

Application of Keggin type molybdovanadophosphoric compounds in synthesis of diphenyl carbonate by oxidative carbonylation with phenolKeggin型磷钼矾杂多化合物在氧化羰基化合成碳酸二苯酯中的应用H4e汉语字典

Inorganic Salts and Carbon Dioxide-Promoted Allylation Reactions of Carbonyl Compounds in Aqueous Media;水相中无机盐和二氧化碳促进羰基化合物烯丙基化反应H4e汉语字典

Studies of One-pot Synthesis Polysubstituted Thiophenes from 1, 3-Dicarbonyl Compounds;由1，3-二羰基化合物一步法合成噻吩衍生物的研究H4e汉语字典

The Preparation of Cobalt Carbonys Catalyst and Its Catalyzed Carbonylation for Synthesis of Diethyl Malonates羰基钴催化剂的制备及其催化羰基化合成丙二酸二乙酯H4e汉语字典

Studies on the Basic Assisted Decomposition of α,α-Dioxo(Ester)Ketene Dithioacetalsα，α－二羰（酯）基烯酮二硫代缩醛化合物的碱性分解反应H4e汉语字典

The Synthesis of α,α-dihalo Ketone and It s Reaction with Allylsamarium Bromide;α，α-二卤代羰基化合物的合成及其与烯丙基钐反应研究H4e汉语字典

Convenient Asymmetric Direct α-Phenylethynylation of β-Dicarbonyl Compounds简便的β-二羰基化合物直接不对称α-苯乙炔基化反应H4e汉语字典

Reactivity of Bis [1,3-di(trimethylsilyl) cyclopentadienyl]tetracarbonyl Di-Iron双[1,3-二(三甲硅基)环戊二烯基]四羰基二铁的反应性H4e汉语字典

The Research Evolvement of Electrocarboxylation from Carbon Dioxide with Olefin, Alkyne and Ketones二氧化碳与烯烃、炔烃以及酮类化合物电羰基化反应的研究进展H4e汉语字典

Improvements on synthesis and purification of 4,6-dinitro-1,3-dichlorbenzene4,6-二硝基-1,3-二氯苯合成与纯化方法的改进H4e汉语字典