Organometallics p. 1503 - 1508 (1987)
Update date:2022-09-26
Topics:
Mayr, Andreas
McDermott, Gregory A.
Dorries, Alison M.
Van Engen, Donna
Reaction of the tungsten carbyne complexes [(W≡CR)Cl(CO)2(py)2] (1a, R = C6H5; 1b, R = CH3) with pyrrole-2-carboxaldehyde methylimine (C6H8N2)/KOH in THF followed by metathesis with NEt4Cl in CH2Cl2 gives the anionic tungsten ketenyl complexes [NEt4][W(C6H7N2) 2(RCCO)(CO)] (3a, R = C6H5; 3b, R = CH3). Alkylation of 3 with methyl fluorosulfate provides the neutral tungsten alkoxyacetylene complexes W(C6H7N2)2(RC≡COCH 3)(CO) (4a, R = C6H5; 4b, R = CH3). The molecular structure of 4a has been determined by X-ray crystallography: space group P21/n, a = 9.568 (2) ?, b = 20.884 (4) ?, c = 10.597 (2) ?, β = 98.25 (2)°, Z = 4, R = 2.8%, Rw = 2.4%.
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Doi:10.1021/jo01061a043
(1961)Doi:10.1016/j.tet.2020.131264
(2020)Doi:10.1016/S0040-4039(00)96338-X
(1987)Doi:10.1007/s11095-017-2271-7
(2017)Doi:10.1021/ja8068177
(2008)Doi:10.1055/s-2008-1067216
(2008)
