环戊二烯基(Cp)基团是许多在催化中应用的过渡金属配合物的重要配体。手性环戊二烯基配体(Cp x)的可用性落后于其他配体类别,因此妨碍了对映选择性过程的研究。我们报告了配备手性Cp支架的手性Cp x Ir III复合物的库。强大的络合程序可为Cp x Ir III络合物可靠地提供可调节的抗衡离子。在概念验证的应用中,含碘化物对烯炔的环异构化反应具有很高的选择性。脱氢哌啶稠合的环丙烷产物以良好的产率和对映选择性形成。
Cu/Fe-Cocatalyzed Formation of β-Ketophosphonates by a Domino Knoevenagel-Decarboxylation-Oxyphosphorylation Sequence from Aromatic Aldehydes and H-Phosphonates
作者:Mingxin Zhou、Yao Zhou、Qiuling Song
DOI:10.1002/chem.201501226
日期:2015.7.20
A domino Knoevenagel–decarboxylation–alkene difunctionalization sequence has been developed for the conversion of benzaldehydes into β‐ketophosphonates, catalyzed by a cooperative Cu/Fe system, whereby CP and CO bonds are formed simultaneously in a one‐pot reaction. The reaction proceeds in good yields and with a broad substrate scope and environmentally benign conditions.
The invention provides novel non-peptidic NPY Y2 receptor inhibitors useful in treating or preventing: anxiolytic disorders or depression; injured mammalian nerve tissue; conditions responsive to treatment through administration of a neurotrophic factor; neurological disorders; bone loss; substance related disorders; obesity; or an obesity-related disorder. Compounds of the invention are also useful in modulating endocrine functions, particularly endocrine functions controlled by the pituitary and hypothalamic glands, and are therefore useful in the treatment or prevention of inovulation and infertility.
The invention provides novel non-peptidic NPY Y2 receptor inhibitors useful in treating or preventing: anxiolytic disorders or depression; injured mammalian nerve tissue; conditions responsive to treatment through administration of a neurotrophic factor; neurological disorders; bone loss; substance related disorders; obesity; or an obesity-related disorder. Compounds of the invention are also useful in modulating endocrine functions, particularly endocrine functions controlled by the pituitary and hypothalamic glands, and are therefore useful in the treatment or prevention of inovulation and infertility.
organic synthesis due to their high reactivity. Herein, we report a Lewis acid-catalyzed cross-coupling reaction of mono- and disubstituted gem-difluorinated cyclopropanes with nucleophiles. The formation of a fluoroallyl cation species triggered via the Lewisacid-assisted activation of the C–F bond is proposed in this transformation. The cation species is then trapped by the nucleophiles, including