动态共价化学方法用于通过1,4-双(有机基膦基)丁烷,甲醛和伯胺的缩合反应立体选择性地合成1,10-diaza-3,8,12,17-四磷环十八烷。分离得到的18元P 4 N 2大环以中观-(R P S P S P R P)或rac-(R P R P R P R P / S P S P S P S P P)异构体。各个立体异构体的结构特征通过NMR光谱和X射线结构分析揭示。所有P 4 N 2大环仅与R P S P S P R P异构体形成方平面镍(II)配合物,其中电子在磷中的孤对电子的取向有利于这种配位模式,而与初始构型无关表示配体的18-元的P 4 N 2大环具有立体异构化的能力。
动态共价化学方法用于通过1,4-双(有机基膦基)丁烷,甲醛和伯胺的缩合反应立体选择性地合成1,10-diaza-3,8,12,17-四磷环十八烷。分离得到的18元P 4 N 2大环以中观-(R P S P S P R P)或rac-(R P R P R P R P / S P S P S P S P P)异构体。各个立体异构体的结构特征通过NMR光谱和X射线结构分析揭示。所有P 4 N 2大环仅与R P S P S P R P异构体形成方平面镍(II)配合物,其中电子在磷中的孤对电子的取向有利于这种配位模式,而与初始构型无关表示配体的18-元的P 4 N 2大环具有立体异构化的能力。
Thieno-pyrimidine compounds having fungicidal activity
申请人:Brewster Kirkland William
公开号:US20060089370A1
公开(公告)日:2006-04-27
The present invention relates to thieno[2,3-d]-pyrimidine compounds having fungicidal activity.
本发明涉及具有杀真菌活性的噻吩[2,3-d]-嘧啶化合物。
Cyanation of aromatic halides
申请人:Weissman A. Steven
公开号:US20060106223A1
公开(公告)日:2006-05-18
A practical, ligand-free cyanation of aryl bromides employs Pd catalyst in combination with a non-toxic cyanide source, M
n
[Fe(CN)
6
] (M=K or Na; n is 3 or 4), or a hydrate thereof, and a base. The reactions are performed in a polar aprotic solvents and provide the corresponding aryl nitrile in 83-96% yield, typically in less than 5 h.
This invention is directed to sorbitol dehydrogenase inhibitory compounds of the formula I,
wherein R1, R2 and R3 are as defined in the specification. This invention is also directed to pharmaceutical compositions containing those compounds and methods of treating or preventing diabetic complications, particularly diabetic neuropathy, diabetic nephropathy, diabetic microangiopathy, diabetic macroangiopathy and diabetic cardiomyopathy by administering such compounds to a mammal suffering from diabetes and therefore at risk for developing such complications. This invention is also directed to pharmaceutical compositions comprising a combination of a compound of formula I of this invention with an aldose reductase inhibitor and to methods of treating or preventing diabetic complications therewith. This invention is also directed to pharmaceutical compositions comprising a combination of a compound of formula I of this invention with an NHE-1 inhibitor and to methods of treating cardiomyopathy and other heart-related problems therewith. This invention is also directed to certain intermediates used in the synthesis of the compounds of formula I and to processes for preparing those intermediates.
COPPER CATALYZED HALOGENATON AND REACTION PRODUCTS
申请人:Wisconsin Alumni Research Foundation
公开号:US20140371480A1
公开(公告)日:2014-12-18
A Cu(I)-catalyzed 1,3-halogen migration reaction effectively recycles an activating group by transferring a halogen from an sp
2
to a benzylic carbon with good enantioselectivity and concomitant borylation of the Ar-halo bond. The resulting enantio-enriched benzyl halide can be reacted in the same vessel under a variety of conditions to form an additional carbon-heteroatom or carbon-carbon bond while maintaining high ee. The reaction can be used to efficiently prepare novel compounds and intermediates for the preparation of therapeutics and ligands for catalysis.
ORGANIC SEMICONDUCTOR COMPOUND, AND TRANSISTOR AND ELECTRONIC DEVICE INCLUDING THE SAME
申请人:Park Jeong-Il
公开号:US20120168726A1
公开(公告)日:2012-07-05
An example embodiment relates to an organic semiconductor compound, represented by Chemical Formula 1 herein, which may be polymerized and used in transistors and electronic devices. The organic semiconductor compound includes a base structure of four fused benzene rings with functional groups R
1
to R
3
connected to a first benzene ring and with functional groups R
4
to R
6
connected to a second benzene ring. The base structure's third and fourth benzene rings are connected to X
1
, X
2
and X
3
, X
4
respectfully. At least one of X
1
and X
2
is a sulfur atom. At least one of X
3
and X
4
is a sulfur atom. The base structure further includes functional groups R
7
and R
8
.