Pd-catalyzed alkylation of halogen-substituted steroids with organozinc compounds
摘要:
A general procedure has been developed for the introduction of hydrophobic alkyl groups into positions 6, 3, and 17 of steroid molecules via palladium-catalyzed Negishi reaction of halogen-substituted steroids with benzyl- and alkylzinc halides.
Palladium-Catalyzed Stereoselective Synthesis of (E)-Stilbenes via Organozinc Reagents and Carbonyl Compounds
作者:Jin-Xian Wang、Kehu Wang、Lianbiao Zhao、Hongxia Li、Ying Fu、Yulai Hu
DOI:10.1002/adsc.200606016
日期:——
In the presence of a catalytic amount of PdCl2(PPh3)2 and a silylating agent, organozinc halides reacted with carbonylcompounds to give the corresponding (E)-stilbenes in good to excellent yields under mild conditions. The reaction mechanism is briefly discussed.
[EN] BICYCLIC CARBOXAMIDE INHIBITORS OF KINASES<br/>[FR] INHIBITEURS DE KINASES À BASE DE CARBOXAMIDES BICYCLIQUES
申请人:ABBOTT LAB
公开号:WO2012097684A1
公开(公告)日:2012-07-26
Compounds of formula (I) or pharmaceutical acceptable salts are provided, wherein X1~X5, R1~R3, A, B, Z and n are defined in the description. And compositions containing said compounds, and the uses for inhibitors of kinases such as ALK, and the uses for treating cancer thereof are provided.
The present invention relates generally to novel compounds relating to the diagnosis and treatment of pathologies relating to the Hedgehog pathway, including but not limited to tumor formation, cancer, neoplasia, and non-malignant hyperproliferative disorders. The present invention includes novel compounds, novel compositions, methods of their use and methods of their manufacture, where such compounds are generally pharmacologically useful as agents in therapies whose mechanism of action involve methods of inhibiting tumorigenesis, tumor growth and tumor survival using agents that inhibit the Hedgehog and Smo signaling pathway.
Trimethylsilyl chloride promoted synthesis of α-branched amines by nucleophilic addition of organozinc halides to nitrones
作者:Ying Fu、Yanhua Liu、Yaojuan Chen、Helmut M. Hügel、Minzhu Wang、Danfeng Huang、Yulai Hu
DOI:10.1039/c2ob26202a
日期:——
general procedure for the nucleophilicaddition of organozinc halides with nitrones in the presence of trimethylsilyl chloride has been developed. Trimethylsilyl chloride was found to be both an indispensable reaction promoter and a ready hydroxylamine protective agent in these reactions. The produced O-(trimethylsilyl)hydroxylamines can be easily reduced into corresponding amines just by a zinc–copper
Formation of quaternary carbons through cobalt-catalyzed C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Negishi cross-coupling
作者:Eduardo Palao、Enol López、Iván Torres-Moya、Antonio de la Hoz、Ángel Díaz-Ortiz、Jesús Alcázar
DOI:10.1039/d0cc02734k
日期:——
quaternary carbons is a key challenge in organic and medicinal chemistry. We report a cobalt-catalyzed C(sp3)–C(sp3) cross-coupling that allows for the introduction of benzyl, heteroarylmethylzinc and allyl groups to halo-carbonyl substrates. The cross-coupling reaction is selective for C(sp3)-over C(sp2)-halides, in contrast to most used catalytic metals, and allows access to novel scaffolds of pharmaceutical