Acylamino Chromium Carbene Complexes: Direct Carbonyl Insertion, Formation of Münchnones, and Trapping with Dipolarophiles
作者:Craig A. Merlic、Andreas Baur、Courtney C. Aldrich
DOI:10.1021/ja9934753
日期:2000.8.1
a one-pot procedure of sequential addition of base, acid chloride, and alkyne to transform simple, stable aminocarbene complexes directly to pyrroles (eq 4). Complex 3b leading to pyrrole 2f also demonstrates that the thermal CO insertion is not limited to aryl carbene complexes. (3) (4) Since unsaturated carbene complexes are quite efficient reactants in Diels Alder cycloaddition reactions15 and there
A new copper-mediated cross-coupling of arenes and arylboronic acids is described. Under the influence of Cu(OCOCF3)(2), the C-H bond arylation of electron-rich arenes with arylboronic acids takes place to afford a range of biaryis in good yields. The reaction is selective for cross-coupling; no homocoupling product arising from arenes or arylboronic acids is detected. Multiple C-H bond arylation is possible with indoles and pyrroles furnishing interesting extended pi-systems.
Vo-Quang, Liliane; Vo-Quang, Yen, Journal of Heterocyclic Chemistry, 1982, vol. 19, p. 145 - 151
作者:Vo-Quang, Liliane、Vo-Quang, Yen
DOI:——
日期:——
Fehrlin, Chemische Berichte, 1889, vol. 22, p. 555