Achieving Nickel Catalyzed C–S Cross-Coupling under Mild Conditions Using Metal–Ligand Cooperativity
作者:Rina Sikari、Suman Sinha、Siuli Das、Anannya Saha、Gargi Chakraborty、Rakesh Mondal、Nanda D. Paul
DOI:10.1021/acs.joc.9b00075
日期:2019.4.5
thiols and (hetero)aryl halides under mild conditions, mostly at room temperature, catalyzed by well-defined singlet diradical Ni(II) catalysts bearing redox noninnocent ligands is reported. Taking advantage of ligand centered redox events, the high-energetic Ni(0)/Ni(II) or Ni(I)/Ni(III) redox steps were avoided in the catalyticcycle. The cooperative participation of both nickel and the coordinated ligands
ALKYNYLPYRIMIDINES AND SALTS THEREOF, PHARMACEUTICAL COMPOSITIONS COMPRISING SAME, METHODS OF PREPARING SAME AND USES OF SAME
申请人:Hartung Ingo
公开号:US20090099219A1
公开(公告)日:2009-04-16
The invention relates to alkynylpyrimidines according to the general formula (I):
in which A, R
1
, R
2
, R
3
, R
4
, R
5
, and R
6
are as defined in the claims, and salts, N-oxides, metabolites, solvates, tautomers and prodrugs thereof, to pharmaceutical compositions comprising said alkynylpyrimidines, to methods of preparing said alkynylpyrimidines, as well as to uses thereof for manufacturing a pharmaceutical composition for the treatment of diseases of dysregulated vascular growth or of diseases which are accompanied with dysregulated vascular growth, wherein the compounds effectively interfere with Tie2 and VEGFR2 signalling.
A method of producing alkali metal benzenesulfinates
申请人:SEITETSU KAGAKU CO. LTD.
公开号:EP0256486A1
公开(公告)日:1988-02-24
A method of producing alkali metal benzenesulfinates having the general formula of
wherein M represents Na or K, which comprises: reacting nitrophenylphenyl sulfones having the general formula of
wherein n is an integer of 1 or 2, with alkali metal thiophenolates having the general formula of
in solvents.
The reaction produces also nitrophenylphenyl sulfides as by-products in equimolar amounts to the alkali metal benzenesulfinates, and the oxidation of the sulfides provides the starting nitrophenylphenyl sulfones.
A method of producing the nitrophenylphenyl sulfones is also provided wherein the sulfides are oxidized with hydrogen peroxide in the presence both of water-soluble tungstates or molybdates and of phase transfer catalysts in a two-phase heterogeneous solvent.
一种生产通式为 其中 M 代表 Na 或 K 的碱金属苯磺酸盐的方法,包括:通式为 其中 n 为 1 或 2 的整数的硝基苯基砜与通式为 的碱金属噻吩酚酸盐在溶剂中反应。 反应还产生与碱金属苯磺酸盐等摩尔量的硝基苯基硫化物作为副产物,硫化物的氧化提供了起始的硝基苯基砜。 还提供了一种生产硝基苯基砜的方法,其中硫化物在水溶性钨酸盐或钼酸盐以及相转移催化剂的存在下,在两相异质溶剂中用过氧化氢氧化。