ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The 2′-cyclopalladated imine complex , reacts with CO in MeOH to afford the 2′-substituted aryl imine 2′-CO2CH3-5′-OCH3—C6H3CH=NTol (Tol = C6H4-4-CH3). The product of this reaction can be altered by changing the bridging ligand from AcO to Cl, in which case only the 5-membered ring heterocyclic compound is obtained. [Pd(μ-OAc)(1a)]2 with 2 equiv. of Ph3P and CO (1 atm) gives the heterocyclic which arises from two CO insertion reactions, whereas [PdX(1a)]2 (X = AcO, Cl) with 4 equiv. of C≡NBut and 4 equiv. of Ph2PCH2CH2PPh2 affords the heterocyclic ketenimine [PdCl(1a)]2 reacts with CH2=CHCO2CH2CH3 to afford 2′(—CH=CHCO2CH2CH3)-5′-OCH3C6H3CHO, and [Pd(μ-OAc)(1a)]2 with I2 to give 2′-I-5′-OCH3C6H3CHO. Excess CH3O2CC≡CCO2CH3 reacts with various substituted cyclopalladated Schiff's bases in MeOH to afford which we formulate as possessing two Pd—C bonds, and one coordinated ester O atom. The X-ray crystal structure of [Pd(μ-OAc)(1a)]2 has been determined; relevant bond lengths [Å] and bond angles [°] are: Pd—O(1), 2.139(6), Pd—O(2), 2.026(6), Pd—N, 2.039(6), Pd—C(2′), 1.951(8), Pd—Pd, 3.113(1), N—Pd—C(2′), 80.9(3), N—Pd—O(1), 97.5(2), C(2′)—Pd—O(2), 91.7(3), O(1)—Pd—O(2), 89.2(2).
Zusätzliches Material:
7 Tab.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19850680730
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