Rhenium-catalyzed regioselective synthesis of 1,2-disubstituted naphthalenes
摘要:
Rhenium-catalyzed coupling reaction of alkynes with phenylacetaldehyde dimethylacetal in the presence of H2O regioselectively afforded the corresponding 1,2-disubstituted naphthalenes. (C) 2012 Elsevier Ltd. All rights reserved.
A facile and efficient copper-catalyzed azidative multifunctionalization of alkynes has been developed by using N-fluorobenzenesulfonimide (NFSI) as both nitrogensource and arylsource and trimethylsilyl azide (TMSN3) as azido source. This transformation proceeds under mild conditions, providing a series of α-azido-α-aryl imine in good yields by a single operation starting from a wide range of alkynes
A ligand‐controlled regiodivergent and enantioselectivecopper‐catalyzed intermolecular hydroallylation of alkynes with allylic phosphates and hydrosilanes has been achieved for the first time. The chiral bidentate sulfonate‐containing N‐heterocyclic carbene ligated CuCl complex leads to enantioenriched SN2′‐type products, whereas the use of the IMesCuCl catalyst affords SN2‐type products. Thus a range
炔烃与烯丙基磷酸酯和氢硅烷的配体控制的区域发散性和对映选择性铜催化的分子间氢化反应已经实现。含手性双齿磺酸盐的N杂环卡宾连接的CuCl配合物可生成对映体富集的S N 2'型产物,而IMesCuCl催化剂的使用可提供S N 2型产物。因此,可以容易地从易得的炔烃以区域发散的方式容易地合成一系列手性支化和非手性线性1,4-二烯。
Catalyst-Free Trans-Selective Oxyiodination and Oxychlorination of Alkynes Employing N–X (Halogen) Reagents
β-halogenated enol esters and ethers are versatile building blocks in organic synthesis, which has attracted increasing attention. In this study, we report the facile trans-oxyiodination and oxychlorination of alkynes, leading to the direct construction of versatile halogenated enol esters and ethers. This transformation features an easy operation, optimal atomic economy, a strong functional group