IR camphor

Figure 8.43 Separation of enantiomers using complexation chromatography. A, Separation of alkyloxiranes on a 42 m x 0.2S mm I.O. open tubular column coated with 0.06 M Mn(II) bis-3-(pentafluoro-propionyl)-IR-camphorate in OV-ioi at 40 C. B, Separation of D,L-amino acids by reversed-phase liquid chromatography using a mobile phase containing 0.005 M L-histidine methyl ester and 0.0025 M copper sulfate in an ammonium acetate buffer at pH 5.5. A stepwise gradient using increasing amounts of acetonitrile was used for this separation.

Preparative Methods conversion of (IR)-camphor into vicinal amino alcohol, followed by A -methylation using either aqueous formaldehyde and formic acid or methyl iodide. Purification bulb-to-bulb distillation, column chromatography. ... 

Figure 13.13 A, enantiomeric forms of 2, 2-dimethylchloroaziridine B, nickel (II) bis-3-heptafluorobutyryl-(IR)-camphorate C, resolution of mixture A on a 100 m capillary column coated with B dissolved in squalane.

Details Crystals, with a special odour a plasticiser specifically for cellulosics, lacquers and varnishes. Camphor, 464-49-3 ((IR)-Camphor), 464-48-2 ((IS)-Camphor)... 

Scheme 9.8 Ir-catalysed reduction of acetophenone with camphor-derived amino sulfide ligands.

Fig. 17.14 Simultaneous stereoanalysis of Lavandula oil constituents, using enantio-MDGC (standard mixture), a Preseparation of racemic compounds unresolved enantiomeric pairs of octan-3-ol (6, 7), frcms-linalool oxide (1, 2), oct-l-en-3-ol (9, 10), ds-linalool oxide (3, 4), camphor (5, 8), linalool (17, 18), linalyl acetate (11, 12), terpinen-4-ol (15, 16) and lavandulol (13, 14). b Chiral resolution of enantiomeric pairs, transferred from the precolumn trans-linalool oxide 1 (2S,5S), 2 (2R,5R) ds-linalool oxide 3 (2R,5S), 4 (2S,5R) camphor 5 (IS), 8 (IR) octan-3-ol 6 R, 7S oct-1-en-3-ol PS, 10 R linalyl acetate 11 R, 12 S lavandulol 13 R, 14 S terpinen-4-ol 15 R, 16 S linalool 17 R, 18 S. [75]...

The bromo-camphor sulphonate, [Ir en2(NO2)2][d-C10H14O4BrS], is prepared by treating the iodide with silver bromo-camphor sulphonate. It separates as a vitreous mass. 

The racemic salts prepared are the bromide, [Ir en3]Br3.8H20, the nitrate, and the perchlorate. All are colourless crystalline bodies. The bromide yields with sodium d-camphor nitronate, 1-triethylene-diamino-iridium d-camphor nitronate, and from the filtrate after... 

The IR spectrum of camphor as KBr disc and Nujol mull were recorded on.a Perkin Elmber 58O B Infrared spectrophotometer to which Infrared data station is attached (Fig. 3). The structural assignments have been correlated with the following frequencies (Table 3). 

Compound 6 was isolated via repetitive column chromatography of the CHCl-j fraction [3]. Compound 6 was shown to be identical upon IR, NMR, and UV comparison with an authentic sample of camphor. 

The photochemical [2 + 2] cycloaddition reaction of alkenes, the light-induced cycloaddition of two carbon-carbon ir-bonds to produce a cyclobutane, is a potentially highly useful reaction in organic synthesis since two new carbon-carbon bonds are formed and a maximum of four new stereocenters are introduced in the process. Ciamician reported the first example in 1908 when he observed the formation of carvone camphor (2) on prolonged exposure of carvone (1) to Italian sunlight (equation 1). ... 

Shaw et al. have described the reaction of the 3-diphenylphosphino-(IR)-(-l-)-camphor dimethylhydrazone complex [Mo(CO)4(PPh2C,oH,5N... 

Amino-2,5-di-s-butyl 112-114/0.5 pic. 134-136 [Pg.440]

The formal potential of substrate-free P450cam is approximately 160 mV more positive than the solution value, but close to the value of the camphor-bound species in solution (E = - 407 mV vs. Ag/AgCl 1 M KCl) [174]. Thus the interaction with the matrix may force displacement of solvent in the local environment of the heme or conformational changes. Changes of the secondary structures, however, were not identified with IR-spectroscopy [72]. 

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