An unusual (4+1), instead of a normal (4+2), cycloaddition has been developed between benzocyclobutenones and styrene-type alkenes via the Rh-catalyzed C−C activation, which provides a distinct one-carbon ring expansion approach to access multi-substituted 2-indanones.
The present invention is directed to compounds of formula (I) which are M1 receptor positive allosteric modulators and that are useful in the treatment of diseases in which the M1 receptor is involved, such as Alzheimer's disease, schizophrenia, pain or sleep disorders. The invention is also directed to pharmaceutical compositions comprising the compounds, and to the use of the compounds and compositions in the treatment of diseases mediated by the M1 receptor.
Divergent synthesis of multi-substituted phenanthrenes <i>via</i> an internal redox reaction/ring expansion sequence
作者:Ryosei Koyama、Masahiro Anada、Shunsuke Sueki、Kosho Makino、Tatsuhiro Kojima、Tomoko Kawasaki-Takasuka、Keiji Mori
DOI:10.1039/d4cc00797b
日期:2024.4.2
internal redox reaction/ringexpansion sequence. The interesting feature of the present system is that it allows for the divergent synthesis of the target skeleton depending on the selected Lewis acid catalyst. When benzylidene malonates with a cyclic structure at the ortho-position were treated with BF3·OEt2, three sequential processes (internal redox reaction/elimination of the alkoxy group/ring expansion)
Fleming, Ian; Loreto, Maria Antonietta; Wallace, Ian H.M., Journal of the Chemical Society. Perkin transactions I, 1986, p. 349 - 360
作者:Fleming, Ian、Loreto, Maria Antonietta、Wallace, Ian H.M.、Michael, Joseph P.
DOI:——
日期:——
Pd-Catalyzed Intramolecular Acylation of Aryl Bromides via C−H Functionalization: A Highly Efficient Synthesis of Benzocyclobutenones
作者:Paula Álvarez-Bercedo、Areli Flores-Gaspar、Arkaitz Correa、Ruben Martin
DOI:10.1021/ja909811t
日期:2010.1.20
A new catalyst system for the intramolecular acylation of aldehydes with aryl bromides via C-H functionalization is described. The transformation is distinguished by a remarkable functional group tolerance and hence allows for the synthesis of a wide variety of highly functionalized benzocyclobutenones with a diverse set of substitution patterns from simple and easily accessible precursors.