1，10－双（1＇－苯基－3＇－甲基－5＇－氧代吡唑－4＇－基）癸二酮－［1，10］与1，10－菲罗啉或2，2＇－联吡啶对钴（Ⅱ）的协同萃取行为研究

本文研究了１，１０－双（１＇－苯基－３＇－甲基－５＇－氧代吡唑－４＇－基）癸二酮－［１，１０］（Ｈ２Ａ）与１，１０－菲罗啉（ｐｈｅｎ）或２，２＇－联吡啶（ｄｉｐｙ）对Ｃｏ（Ⅱ）的协同萃取行为．确定了协萃配合物的组成为ＣｏＡ·Ｂ（Ｂ分别为Ｐｈｅｎ和ｄｉｐｙ），求得萃取平衡常数ｌｏｇＫｅｘ分别是４．７８（Ｈ２Ａ＋ｐｈｅｎ）和１．６１（Ｈ２Ａ＋ｄｉｐｙ），并对协萃配合物的ＩＲ谱进行了讨论．     

BPMOPP与1,10—菲咯啉对铈的协同萃取

研究了１，２－双（１＇－苯基－３＇－甲基－５＇－氧化吡唑－４＇－基）－１，２苯二酮对盐酸介质中铈的萃取变价为及与１，１０－菲咯啉从盐酸及盐与甲酸钠缓冲溶液中对铈的协同萃取得为，斜率法测定协萃合物的组成的ＣｅＡ．ＨＡｐｈｅｎ，求得了协萃平衡常数，萃取法制得了固态配合物，对其组成，ＵＶ，ＩＲ，ＨＮＭＲ，ＴＧ－ＤＴＡ进行了研究，讨论了协萃机理豚萃合物的可能结构。     

1,10－双(1''－苯基－3''－甲基－5''－氧代吡唑－4''－基)癸二酮－[1,10]与1,10－菲罗啉或2,2''－联吡啶对钴(Ⅱ)的协同萃取行为研究

本文研究了１，１０－双（１＇－苯基－３＇－甲基－５＇－氧代吡唑－４＇－基）癸二酮－［１，１０］（Ｈ２Ａ）与１，１０－菲罗啉（ｐｈｅｎ）或２，２＇－联吡啶（ｄｉｐｙ）对Ｃｏ（Ⅱ）的协同萃取行为。确定了协萃配合物的组成为ＣｏＡ．Ｂ（Ｂ分别为ｐｈｅｎ和ｄｉｐｙ），求得萃取平衡常数ｌｏｇＫｅｘ分别是４．７８（Ｈ２Ａ＋ｐｈｅｎ）和１．６１（Ｈ２Ａ＋ｄｉｐｙ），并对协萃配合物的ＩＲ谱进行了讨论。     

1,9-双(1'-苯基-3'-甲基-5'-氧代吡唑-4'-基)壬二酮-[1,9]与三辛基氧膦对镧(Ⅲ)、镝(Ⅲ)的协同萃取

研究了１，９－双（１－苯基－３－甲基－５－氧代吡唑－４－基）壬二酮－［１，９］（ＢＰＭＰＮＤ，Ｈ２Ａ）与三辛基氧膦（ＴＯＰＯ，Ｂ）的氯仿溶液，从硝酸介质中对Ｌａ（Ⅲ）、Ｄｙ（Ⅲ）的协同萃取，计算了体系的酸性协萃系数ＲＡ和协萃系数Ｒ，用斜率法测得协萃合物的组成为ＬａＡ·ＨＡ·Ｂ和ＤｙＡ·ＨＡ·Ｂ，计算了协萃平衡常数，研究了温度对协萃反应的影响，用萃取法制得了固态协萃合物，并对其组成、ＩＲ及ＴＧ－ＤＴＡ进行了研究．     

1,9—双（1′—苯基—3′—甲基—5′—氧代吡唑—4′—基）壬二酮—（1,9）与三？…

研究了１，９－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）壬二酮－（１，９）（ＢＰＭＰＮＤ，Ｈ２Ａ）与三辛基氧膦（ＴＯＰＯ，Ｂ）的氯仿溶液，从硝酸介质中对Ｌａ（Ⅲ），Ｄｙ（Ⅲ）的协同萃取，计算了体系的酸性协萃系数ＲＡ和协萃系数Ｒ，用斜率法测得协萃合物的组成ＬａＡ．ＨＡ．Ｂ和ＤｙＡ．ＨＡ．Ｂ计算了协萃取平衡常数，研究了温度对协萃反应的影响，用萃取法制得了固态协萃合物，并对其组成，ＩＲ及ＴＧ     

1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-[1,10]与三苯基氧化膦对钐(Ⅲ)的协同萃取行为研究

研究了１，１０－双（１′－苯基－３′－甲基－５′－氧代吡唑－４－基）癸二酮－［１，１０］（ＢＰＭＰＤＤ，Ｈ２Ａ）与三苯基氧化膦（ＴＰＰＯ，Ｂ）的氯仿溶液从硝酸介质中对Ｓｍ（Ⅲ）的协同萃取行为，计算了体系的酸性协萃系数ＲＡ和协萃系数Ｒ，用斜率法测得协萃合物的组成为ＳｍＡ·ＨＡ·Ｂ，计算了协萃平衡常数，用萃取法制得了固态协萃合物，并对其组成、ＩＲ及ＴＧ－ＤＴＡ进行了研究     

1,10—双（1′—苯基—3′—甲基—5′—氧代吡唑—4′—基）癸二酮—（1,10）？…

研究了１，１０－双（１′－苯基－３′－甲基－５′－氧代吡唑－４－基）癸二酮－（１，１０）（ＢＰＭＰＤＤ，Ｈ２Ａ）与三苯基氧化膦（ＴＰＰＯ，Ｂ）的氯仿溶液从硝酸介质中对Ｓｎ（Ⅲ）的协同萃取行为，计算了体系的酸性协萃系数ＲＡ和协萃系数Ｒ，用斜率法测得协萃合物的组成为ＳｍＡ．ＨＡ．Ｂ，计算了协萃平衡常数，用萃取法制得了固态协萃合物，并对其组成ＩＲ及ＴＧ－ＤＴＡ进行了研究。     

一个新的铀（Ⅵ）三元协萃体系

研究了由４，４＇－癸二酰－双－（１－苯基－３－甲基－５－吡唑啉酮）（ＤＢＰＭＰ，简作Ｈ２Ａ），氧化三辛基膦（ＴＯＰＯ），吡啶（Ｐｙ）组成的三元体系从硝酸溶液中对铀的协同萃取，斜率法确定萃合物组成为ＵＯ２Ａ．ＴＯＰＯ．Ｐｙ，制取了固体协萃配合物，并用元素分析、ＩＲ及ＨＮＭＲ等进行了表征。     

苯基硫脲—磷酸三丁酯二元中性体系对钯的协同萃取研究

本文研究了苯基硫脲－磷酸三丁酯组成的二元中性体系在ＨＣｌ介质中Ｐｄ（ＩＩ）的萃取行为，发现该体系有明显的协同萃取效应。实验证明：在０．５－６ｍｏｌ／Ｌ ＨＣｌ介质中，该体系能定量萃取Ｐｄ（ＩＩ）。文中研究了萃取的最佳条件，试验了反萃取条件及共存离子对Ｐｄ（ＩＩ）萃取的影响。用斜率法测得萃合物的组成为Ｐｄ：ＰＴＵ：ＰＴＢ＝１：２：２，采用电子吸收光谱及红外光谱对协萃机理及萃合物的结构作了探讨。     

2,6—双[（1—苯基—3—甲基—5—氧—4—吡唑啉基）甲酰基]吡啶对铀的液液萃取

研究了新型双β－酮萃取剂２，６－双「（１－苯基－３－甲基－５－氧－４吡唑啉基甲酰基」吡啶的氯仿溶液对铀酰的萃取行为，所得萃合物组成为ＵＯ２（ＨＡ）２。     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives

Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

A general and convenient synthesis of 4-(tosylmethyl)semicarbazones and their use in amidoalkylation of hydrogen,heteroatom, and carbon nucleophiles

A general synthesis of previously unknown semicarbazone-based α-amidoalkylating reagents, 4-(tosylmethyl)semicarbazones, has been developed. The synthesis involved three-component condensation of semicarbazones of aliphatic or aromatic aldehydes with the same or other aldehydes and p-toluenesulfinic acid. The scope and limitations of this reaction were investigated. The compounds obtained were demonstrated to be an efficient α-(4-semicarbazono)alkylating agents. They were reacted with H- (sodium borohydride), O- (sodium methylate), S- (sodium phenylthiolate), N- (pyrrolidine, sodium succinimide), P- (trialkyl phosphites), and C-nucleophiles (sodium diethyl malonate) to give the corresponding products of the tosyl group substitution, 4-substituted semicarbazones, including analogues of nitrofurazone. Among the prepared compounds tested in vitro for antibacterial and antifungal activity, three nitrofuryl-containing semicarbazones exhibited high biological activities with minimum inhibitory concentration (MIC) values of 8–32 μg/mL.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

Synthesis of novel chiral bidentate hydroxyalkyl-N-heterocyclic carbene ligands and their application in palladium-catalyzed Mizoroki–Heck couplings and asymmetric addition of diethylzinc to benzaldehyde

A small library of new chiral bidentate hydroxyalkyl-imidazolium salts 1 is conveniently synthesized on multi-gram scale from inexpensive and commercially available chiral pool amino acids. The corresponding carbenes, generated by deprotonation of imidazolium salts 1, in combination with palladium(II) chloride were tested in the Mizoroki–Heck coupling reaction. The most significant results in terms of yields and reactivities were achieved with low catalyst loading. The catalytic activities of these imidazolium salts were also investigated in the asymmetric addition of diethylzinc to benzaldehyde. The use of MgO nanoparticles as an additive in conjunction with these ligands played a crucial role in increasing the efficiency of these reactions.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.