132295-73-9Relevant academic research and scientific papers
Organic Syntheses via Transition Metal Complexes, 51. - 1-Metalla-1,3,5-trienes and 1-Metalla-1,3-dien-5-ynes of Chromium and Tungsten by Insertion of Alkynes into M=C and C=C Bonds of 1-Metalla-1,3-dienes and 1-Metalla-1-en-3-ynes, respectively.
Aumann, Rudolf,Heinen, Heinrich,Hinterding, Peter,Straeter, Norbert,Krebs, Bernt
, p. 1229 - 1236 (2007/10/02)
1-Metalla-1,3,5-trienes LnM=C(NEt2)-C(Me)=C(OEt)-CH=CHPh (3, 4) and LnM=C(OEt)-CH=C(NEt2)-C(Me)=CHPh nM= Cr(CO)5 (a), W(CO)5 (b)> are obtained for the first time from the corresponding 1-metalla-1,3-dienes LnM=C(OEt)-CH=CHPh (1a, b) under very mild conditions by the insertion of the electron-rich alkyne Et2N-CC-Me (2) into the M=C and the C=C bonds, respectively, of 1.The chelate complex (6b) and the cyclobutenyl carbene complex 7b are isolated as minor side products. 1-Metalla-1,3-dien-5-ynes LnM=C(NEt2)-C(Me)=C(OEt)-CCPh nM = Cr(CO)5 (a), W(CO)5 (b)> are formed with high regio- and stereoselecti vity on insertion of 2 into the M=C bonds of 1-metalla-1-en-3-ynes 8.X-ray data are given for the tungsten complex 3b.
