Mechanism of the palladium-catalyzed metal-carbon bond formation. Isolation of oxidative addition and transmetalation intermediates

被引：25

作者：

Cianfriglia, P

Narducci, V

LoSterzo, C

Viola, E

Bocelli, G

Kodenkandath, TA

机构：

[1] UNIV ROMA LA SAPIENZA,DIPARTIMENTO CHIM,CTR CNR STUDIO MECCANISMI REAZIONE,I-00185 ROME,ITALY

[2] CNR,CTR STUDIO STRUTTURIST DIFFRATTOMETR,I-43100 PARMA,ITALY

来源：

ORGANOMETALLICS | 1996年 / 15卷 / 24期

关键词：

D O I：

10.1021/om9601965

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

To investigate the reaction mechanism of the Pd-catalyzed metal-carbon bond formation, the model compounds [eta(5)-1-Ph(2)P-2,4-Ph(2)C(5)H(2)](CO)(3)MI (M = Mo, 12; M = W, 13) have been prepared and their reactions studied under coupling conditions. Treatment of 12 and 13 with stoichiometric amounts of zerovalent palladium yields the complexes [eta(5)-1-Ph(2)P-2,4-Ph(2)C(5)H(2)](CO)(3)MPd(PPh(3))I (M = Mo, 16; M = W, 17) by oxidative addition of the M-I moieties on Pd-0. Subsequent reaction of intermediates 16 and 17 with 4-nitro-1-[2-(tributylstannyl)ethynyl]benzene(Bu(3)SnC=C(C6H4) p-NO2, 18) leads to the formation of the transmetalation products [eta(5)-1-Ph(2)P-2,4-Ph(2)C(5)H(2)](CO)(3)MPd(PPh(3))C=C(C6H4)p-NO2 (M = Mo, 19; W, 20), which have been isolated and characterized. Complexes 13 and 17 have been also characterized by X-ray analysis.

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页码：5220 / 5230

页数：11

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