Rh(I)-Catalyzed Cross-Coupling of α-Diazoesters with Arylsiloxanes
摘要:
An Rh(I)-catalyzed cross-coupling of diazoesters with arylsiloxanes has been successfully achieved. This transformation is a new method for the construction of the C(sp(3))C(sp(2)) bond, thus providing an alternative synthesis of a-aryl esters. Rh(I)carbene migratory insertion has been proposed to be involved in this coupling reaction. The reaction represents the first example of utilizing arylsiloxane as the coupling partner in the carbene-involved cross-coupling reactions.
Rhodium(III)-Catalyzed<i>ortho</i>Alkenylation of<i>N</i>-Phenoxyacetamides with<i>N</i>-Tosylhydrazones or Diazoesters through CH Activation
作者:Fangdong Hu、Ying Xia、Fei Ye、Zhenxing Liu、Chen Ma、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201309650
日期:2014.1.27
A coupling reaction of N‐phenoxyacetamides with N‐tosylhydrazones or diazoestersthrough RhIII‐catalyzed CHactivation is reported. In this reaction, ortho‐alkenyl phenols were obtained in good yields and with excellent regio‐ and stereoselectivity. Rh–carbene migratory insertion is proposed as the key step in the reaction mechanism.
Copper-catalyzed cascade coupling/cyclization of terminal alkynes with diazoacetates: a straightforward route for trisubstituted furans
作者:Lei Zhou、Jiachen Ma、Yan Zhang、Jianbo Wang
DOI:10.1016/j.tetlet.2011.08.060
日期:2011.10
A copper-catalyzedcascade coupling/cyclization of terminal alkynes with α-alkyl substituted diazoesters is developed. This new method furnished a straightforward route for 2,3,5-trisubstituted furan derivatives with good efficiency and selectivity.
Corrigendum to ‘Copper-catalyzed cascade coupling/cyclization of terminal alkynes with diazoacetates: a straight route for trisubstituted furans’ [Tetrahedron Lett. 52 (2011) 5484–5487]