| 19690687 |
Marchetti F, Pampaloni G, Zacchini S: Fragmentation of oxygen-containing molecules via C-O bond cleavage promoted by coordination to niobium and tantalum pentahalides. Dalton Trans. 2009 Sep 14;(34):6759-72. Epub 2009 Jul 20.
The stable complexes [NbX (4){O-O}(2)][NbX (6)] [X = F, O-O = (MeO (2) C) CH [double bond, length as m-dash] CH (2)(CO (2) Me), ; X = Cl, O-O = (EtO (2) C) CH [double bond, length as m-dash] CH (2)(CO (2) Et), ; X = F, O-O = CH (2)(CO (2) Me)(2), ] and [NbCl (4){(EtO (2) C) CH [double bond, length as m-dash] CH (CO (2) Et)}][NbCl (6)] () have been prepared by reacting NbX (5) (X = F, Cl) with variable amounts of the appropriate diester. |
2(0,0,0,2) |
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| 17109538 |
Chakravarty M, Swamy KC: Palladium-catalyzed coupling of allenylphosphonates, phenylallenes, and allenyl esters: remarkable salt effect and routes to novel benzofurans and isocoumarins. J Org Chem. 2006 Nov 24;71(24):9128-38.
Coupling reactions of allenylphosphonates (OCH (2) CMe (2) CH (2) O) P (O) CH=C=CRR' [R, R' = H (1a), R = H, R' = Me (1b), R = R' = Me (1c)] with aryl iodides, iodophenol, and iodobenzoic acid in the presence of palladium (II) acetate are investigated and compared with those of phenylallenes PhCH=C=CR2 [R = H (2a), Me (2b)] and allenyl esters EtO (2) CCH=C=CR (2) [R = H (2c), Me (2d)]. |
1(0,0,0,1) |
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