Acetonitrile, bis-

Thermal decarboxylation of pyrimidylcarboxylic organotin esters is another means to prepare the corresponding stannylpyrimidines [33]. This method obviates the intermediacy of lithiated pyrimidine species that would undergo undesired reactions at higher temperatures. The decarboxylation occurs at the activated positions. Therefore, thermal decarboxylation of tributyltin carboxylate 62, derived from refluxing carboxylic acid 61 with bis(tributyltin) oxide, provided 4-stannylpyrimidine 63. Addition of certain Pd(II) complexes such as bis(acetonitrile)palladium(II) dichloride improved the yields, whereas AIBN and illumination failed to significantly affect the yield. 

Die Umsetzung von aktivierten Ethenen (z. B. Butenon, Acrylsaure-ester, Acrylnitril) mit N-Methyl-anilin oder 2-Brom-anilin und 1,4-Benzoehinon in Tetrahydrofuran in Gegen-wart von Lithiumchlorid und 0,1 Mol-Aquivalenten Bis-[acetonitril]-palladium-dichlorid fiihrt zur Aminierung der Methylen-Gruppe der Ethen-Derivate2. 

Methyl-2-(4-methyl-benzohulfonyl)-cis-2-aza-bkyclo[3.3.0]oct-i-en In einen Rundkolbcn (mindestens 250 ml) gibt man 1,00-4,50 g (3,58-16,0 mmol) 4-Methyl-benzolsulfonsaurc-(cw-2-allyl-cyclopentyl-amid), 10mol-% Bis-[acetonitril]-palladium(Il)-chlorid, 1.0 mol-equiv. 1,4-Benzochinon, 2,0 mol-equiv. Natrium-carbonat, 5,0 mol-equiv. Lithiumchlorid und 100-125 ml Tetrahydrofuran. Das Gemisch wird... 

The high level of stereocontrol in the formation of complexes 25 and 27 suggests that compounds of this type may be useful as chiral catalysts. Indeed, several examples of enantioselective catalytic reactions carried out with half-sandwich complexes have been published recently [23, 25]. However, it seemed desirable to have access to complexes of the [21 Ru(solv)2] type, which have two easily removable solvent molecules coordinated to the central metal, in order to provide coordination sites for a substrate to be transformed. Although the chloride ligand could be easily removed from 23 and 25 all attempts to strip off the PPhs were unsuccessful. Therefore a new reaction scheme was developed which precluded the use of phosphine ligands, and the bis (acetonitrile) complex 28 could be obtained in a multi-step protocol via the T1 salt T1 21 (Scheme 1.5.12) [26]. 

Scheme 1,5.12 Multi-step synthesis of the bis(acetonitrile) complex 28.

C14N3RuC12H26, Ruthenate(l -), tetrachloro-bis(acetonitrile)tetraethylammo-nium, 26 356... 

RuC12N2C12HiB, Ruthenium(II), bis-(acetonitrile)dichloro(T) l-l, 5-cyclooctadiene)-, 26 69 RuC12N2C22H22, Ruthenium(II), bis-(benzonitrile)dichloro(T)5-l, 5-cyclooctadiene)-, 26 70 RuC1iH12N4, Ruthenium(III), tetraammine-dichloro-... 

W ACKER OXIDATION AllyltrimcthyE silane. Bis(acetonitrile)chloronitro-palladium(H). Palladium(ll) chloride. Triethylborane. 

Dihydro-2H-pyran 2H-Pyran, 3,4-dihydro- (8,9) (110-87-2) tert-Butyllithium Lithium, tert-butyl- (8) Lithium, (1,1-dimethylethyl)- (9) (594-19-4) Palladium(ll) chloride bisacetonitrile Aldrich Bis(acetonitrile)dichloropalladium(ll) Palladium, bis(acetonitrile)dichloro- (8,9) (14592-56-4)... 

At room temperature, Raman spectroscopy has been used to study the solvation of AgN03 in H20-MeCN mixtures.157 Solvation numbers were found to vary with Ag+ concentration, being near four in the dilute concentrations range (<0.05 M), about two in the moderate concentration range (—0.05-5.0M) and decreasing to about one at higher concentrations (>5.0M).157 The formation constants of the mono- and bis-acetonitrile complexes were determined to be 0.41(log/Ji) and 0.78(log f 2) in water-acetonitrile mixtures.158... 

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