Synthesis of peptide-like derivatives of cis- and trans-4-aminocyclohexanecarboxylic acids containing sarcolysine

1978 ◽  
Vol 27 (4) ◽  
pp. 795-798
Author(s):  
K. I. Karpavichyus ◽  
L. A. Patotskene ◽  
I. L. Knunyants
Keyword(s):  
Cis And Trans ◽  
Derivatives Of

cis and trans influences on [Pt(SRF)(triphos)]+ complexes (SRF = polyfluorobenzothiolate)

2015 ◽  
Vol 39 (1) ◽  
pp. 631-638 ◽  
Author(s):  
Ruy Cervantes ◽  
Jorge Tiburcio ◽  
Hugo Torrens
Keyword(s):  
Tridentate Ligand ◽  
Cis And Trans ◽  
Derivatives Of

Platinum(ii) derivatives of the tridentate ligand Ph2PCH2CH2P(Ph)CH2CH2PPh2 (triphos), including [Pt(SRF)(triphos)](CF3SO3) RF = C6F4CF3-4 1, C6F52, C6HF4-4 3, C6H4CF3-4 4, C6H3F2-2,4 5, C6H4F-2 6, C6H4F-4 7 and C6H58, have been prepared and characterised.

13C Nuclear Magnetic Resonance Studies of Organometallic Compounds. IV. cis-Dimethylplatinum(II) Derivatives

1974 ◽  
Vol 52 (7) ◽  
pp. 1165-1170 ◽  
Author(s):  
Howard Charles Clark ◽  
Leo Ernest Manzer ◽  
John Edward Henry Ward
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Organometallic Compounds ◽  
Methyl Groups ◽  
Magnetic Resonance Studies ◽  
Trans Influence ◽  
13C Nuclear Magnetic Resonance ◽  
Cis And Trans ◽  
Derivatives Of ◽  
Nuclear Magnetic

Data derived from the 13C n.m.r. spectra of seven neutral cis-dimethylplatinum(II) derivatives of the type cis-(CH3)2PtL2 and cis-(CH3)2Pt(L—L) (where L and L—L are neutral donors) are discussed and compared with data derived from the 1H n.m.r. spectra of the complexes. Simultaneous variations in L or L—L reveal that the n.m.r. trans-influence rather than the n.m.r. cis-influence is dominant. The suggestion that the n.m.r. cis- and trans-influences may be additive is discussed. In contrast with data obtained by other workers, it is shown that the 1JCH values of the platinum methyl groups are essentially insensitive to variations in the remaining ligands.

Chemical and biological properties of some derivatives of cis-and trans-1-hydroxyquinolizidine

1968 ◽  
Vol 11 (2) ◽  
pp. 353-357 ◽  
Author(s):  
James D. England ◽  
Davis Temple ◽  
Joseph Sam
Keyword(s):  
Biological Properties ◽  
Cis And Trans ◽  
Derivatives Of

Substituted carbonyl derivatives of the Group VI transition metals. II. Complexes with tritolylphosphines

1971 ◽  
Vol 24 (12) ◽  
pp. 2471 ◽  
Author(s):  
JA Bowden ◽  
R Colton
Keyword(s):  
Steric Effects ◽  
Molar Ratio ◽  
Mass Spectral Data ◽  
Group Vi ◽  
Mass Spectral ◽  
Carbonyl Derivatives ◽  
Nuclear Magnetic Resonance Spectra ◽  
Metal Hexacarbonyls ◽  
Cis And Trans ◽  
Derivatives Of

The reactions of the three tritolylphosphines (ortho, meta, and para) with the metal hexacarbonyls, M(CO)6 (M = Cr, Mo, W), have been investigated under a variety of conditions of temperature, ultraviolet irradiation, and molar ratio. The products were of the general formulae M(CO)5L and cis and trans M(CO)4L2 [L = tri-tolylphosphine] although not all the tetracarbonyl complexes could be prepared. Infrared and nuclear magnetic resonance spectra of these compounds showed interesting trends as the ligand was varied. ��� In addition, a novel series of derivatives with tri(o- tolyl)phosphine (pot) has been isolated, which on the basis of infrared, N.M.R., and mass spectral data are formulated as π- (pot)M(CO)3. ��� The nature of the above reactions and the properties of the products are explained in terms of an argument based on steric effects.

Substituent Interactions in Di- and Tri-acyl Derivatives of cis- and trans- 2-Hydrazinocyclopentanol

1973 ◽  
Vol 51 (10) ◽  
pp. 1587-1597 ◽  
Author(s):  
J. A. Campbell ◽  
Donald Mackay
Keyword(s):  
Acetyl Derivative ◽  
Ester Group ◽  
Major Product ◽  
Amide Group ◽  
Acid Mixture ◽  
Tosyl Chloride ◽  
Cis And Trans ◽  
Work Up ◽  
Derivatives Of ◽  
Acyl Derivatives

The action of thionyl chloride followed by an alkaline work-up quantitatively isomerizes trans-1,2-dibenzoyl-1-(2-hydroxylcyclopentyl)hydrazine(5) to cis-2-benzoyl-1-(2-benzoyloxycyclopentyl)hydrazine (3). One equivalent of tosyl chloride in pyridine converts 5 to an intermediate which can be hydrolyzed to a mixture of 3 and 5 or can be transformed to the N-tosyl derivative 13 by tosylation and then hydrolysis. Oxazolidine structures are suggested as intermediates for these reactions.The alcohol 2 can also be isomerized to 3, using 0.8 N aqueous ethanolic hydrochloric acid, to which 5 is inert. The ester 3 is again the major product in the hydrolysis by this acid mixture of the cis-tribenzoyl derivative 17, the cis-N1-p-anisoyl derivative 21a and the cis-N1-acetyl derivative 21b, the amide group being cleaved much more rapidly than the ester, especially in the case of 21b. A mechanism involving ester participation by way of an oxazolidinium cation is proposed for these amide hydrolyses, and this is supported by tracer studies.The trans-esters 24a and b hydrolyze mainly at the ester group with retention of configuration.Polymorphism is a common phenomenon among the title compounds.

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