Notizen: Synthesis and NM R Study of (η⁶-1,4-diphenyl-1,3-butadiene)tricarbonylchromium(0)

Transition-Metal-Mediated Dearomatization Reactions

“…This procedure is suited for the preparation of a wide range of complexes, often in high yields (80−95%) with reaction times typically in the 1−4 day range. Milder complexation conditions and shorter reaction times are possible with suitable Cr(CO) 3 L 3 (L = CH 3 CN, Py, NH 3 ) precursors, which allow higher compatibility with arenes bearing functional groups and higher chemo- and diastereoselectivity . Room-temperature complexation of arenes is accomplished by reaction of Cr(CO) 3 (NH 3 ) 3 with BF 3 ·OEt 2 in the presence of an arene, a method particularly well suited for condensed aromatics. , Finally, complexation can also be carried out by arene exchange in (naphthalene)Cr(CO) 3 .…”