Iron-catalysed tandem cross-dehydrogenative coupling (CDC) of terminal allylic C(sp3) to C(sp2) of styrene and benzoannulation in the synthesis of polysubstituted naphthalenes
Markovnikov-Selective Hydrothiolation of Styrenes: Application to the Synthesis of Stereodefined Trisubstituted Olefins
作者:Markku A. Savolainen、Jimmy Wu
DOI:10.1021/ol4015909
日期:2013.7.19
BT-sulfones react with aromatic aldehydes to furnish trisubstituted alkenes with excellent Z stereoselectivity. These sulfones are synthesized by hydrothiolation of styrene and styrenyl derivatives (followed by oxidation). This method provides a conceptually novel way to prepare these important sulfur compounds.
Abstract The synthesis and characterization of a series dipalladium(I) complexes of formulae [Pd1-[2′-(methoxycarbonyl)phenyl]-3-[4′-X-phenyl]triazenide}]2 [X = F (4), Cl (5), Br (6)] are reported. The crystal structure of complex 4 was determined by X-ray diffraction studies. The previously reported dipalladium(I) 1–3 as well as the new complexes 4–6 were used as catalysts in the Heck and Suzuki
A regio- and stereoselective entry to (Z)-β-halo alkenyl sulfides and their applications to access stereodefined trisubstituted alkenes
作者:Ge Liu、Lichun Kong、Ji Shen、Gangguo Zhu
DOI:10.1039/c4ob00103f
日期:——
sulfides in high yields with excellent regio- and stereoselectivity. This approach covers a variety of substrates, including both aryl and alkyl haloalkynes. Meaningfully, it allows a facile access to stereodefined (Z)- or (E)-trisubstituted olefins featuring the iterative cross-coupling of carbon–halide and carbon–sulfur bonds of β-halo alkenyl sulfides.
已经实现了通过K 2 CO 3促进卤代炔烃的氢硫醇化来温和有效地制备(Z)-β-卤代烯基硫化物,在高浓度下生产(Z)-β-溴和(Z)-β-氯代乙烯基硫化物。产生具有优异的区域和立体选择性的产物。该方法涵盖了多种底物,包括芳基和烷基卤代炔烃。有意义的是,它允许轻松访问立体定义的(Z)或(E)三取代的烯烃,其特征在于β-卤代烯基硫醚的卤化碳和碳硫键具有迭代交叉偶联。
Lewis Acid Promoted Carbon−Carbon Double-Bond Formation via Organozinc Reagents and Carbonyl Compounds
Using cheap and readily available AlCl3 as Lewis acid, functionalized aldehydes react with organozinc reagents to give (E)-alkenes stereoselectively in high yields.
Arylation of Styrenes with Aryliron Complexes [CpFe(CO)<sub>2</sub>Ar]
作者:Shigeo Yasuda、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1021/om1001952
日期:2010.6.14
Treatment of aryliron complexes [CpFe(CO)(2)Ar] with styrenes in boiling xylene affords the corresponding stilbenes. The aryliron complexes, which become active upon heating, serve as arylating agents in the reaction.