WULFF, W. D.;GILBERTSON, S. R.;SPRINGER, J. P., J. AMER. CHEM. SOC., 1986, 108, N 3, 520-522
作者:WULFF, W. D.、GILBERTSON, S. R.、SPRINGER, J. P.
DOI:——
日期:——
Reactions of cobalt carbene complexes with alkynes. .eta.4-Vinylketene-complexed intermediates and a novel synthesis of bovolide
作者:William D. Wulff、Scott R. Gilbertson、James P. Springer
DOI:10.1021/ja00263a035
日期:1986.2
conclusively that, for Rh2(02CCH3)4(PPh3)2, v(RhRh) is a t 289.3 cm-I. Since the RhRh bond length in this complex is 2.4505 (2) A," longer than in the analogous AsPh3 (2.427 (1) A),'2 SbPh, (2.421 (4) A),'* and H20 (2.3855 (5) A)I6 complexes, the implication is that v(RhRh) in these complexes must all lie above 289.3 cm-I, as indeed is found to be the case for the AsPh3 and SbPh, derivatives (vide
available Cp*Mo(II)-complexes as efficient deoxygenation catalysts that could catalyze the direct intermolecular deoxygenative coupling of carbonylcompounds with alkynes. Enabled by this powerful Cp*Mo(II)-catalyst, various valuable heteroarenes (10 different classes) were obtained in generally good yields and remarkable chemo- and regioselectivities. Mechanistic studies suggested that this reaction might