Partially Hydrogenated Methyl Ester

Methyidithiomethane. See Methyl disulfide Methyl docosanoate. See Methyl behenate Methyl 1, 2, 3, 4, 4a, 4b, 5, 6, 7, 8,10,10a-dodecahydro- 7- isopropyl-1,4a-dimethylphenanthren-1- carboxylate. See Methyl ester of rosin, partially hydrogenated Methyl dodecanoate Methyl n-dodecanoate Methyl dodecylate. See Methyl laurate Methyidodecyl, methyl (2-phenylpropyl) siloxane. See Dodecylmethylsiloxane/2-phenylpropylmethylsiloxane copolymer Methyl eicosanoate... 

Methyl rosinate, hydrogenated. See Methyl hydrogenated rosinate Methyl rosinate, partially hydrogenated. See Methyl ester of rosin, partially hydrogenated Methyl salicylaldehyde. See o-... 

Although these Boc derivatives underwent methylation with poor selectivity (compared to 3-amino-N-benzoyl butanoates [106] and Z-protected methyl 4-phen-yl-3-aminobutanoate [107]), epimers were succesfully separated by preparative HPLC or by flash chromatography. However, saponification of the methyl ester caused partial epimerization of the a-stereocenter and a two-step (epimerization free) procedure involving titanate-mediated transesterification to the corresponding benzyl esters and hydrogenation was used instead to recover the required Boc-y9 -amino acids in enantiomerically pure form [104, 105]. N-Boc-protected amino acids 19 and 20 for incorporation into water-soluble /9-peptides were pre-... 

The same reaction sequence may be used to convert cyclo-dodecanone to cyclotetradecanone. Preparation of the pyrrolidine enamine of cyclododecanone requires 2-3 days at reflux, and reaction of the enamine with methyl propiolate is best carried out in refluxing hexane. The enamine-propiolate reaction may also be used to convert cycloheptanone to cyclononanone. In this case the procedure must be modified to provide for partial hydrogenation of the intermediate amino ester without prior hydrolysis.8 The reduced intermediate is saponified as described in the present procedure. 

Macher, M.-B., Hogberg, J., Mpller, P., Harrod, M. Partial Hydrogenation of Fatty Acid Methyl Esters at Supercritical Conditions. Fett/Lipid. 1999, 101, 301 - 305. 

This unit describes the attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopic method (AOCS, 1999a AOAC International, 2000), a novel method for measuring the total amount of fat with isolated trans double bonds. It is applicable to natural fats (ruminant fats) and processed fats and oils (partially hydrogenated fats and oils or refined vegetable oils) consisting of long-chain fatty acid methyl esters or triacylglycerols with trans levels >5%, as percent of total fat (AOAC International, 2000). 

Monographs / Methyl Ester of Rosin, Partially Hydrogenated / 289... 

Methyl 4,6-0-benzylidene-3-deoxy-a-D-ribo-hexopyranoside (56) was benzoylated, debenzylidenated, and partially p-toluenesulfon-ylated to 57 this was converted into 58 by reaction with sodium iodide, followed by catalytic reduction. The methanesulfonate of 58 was converted into 59 by reaction with sodium azide in N,N-dimethylformamide, and 59 was converted into 4-azido-3,4,6-trideoxy-a-D-xylo-hexose (60) by acetolysis followed by alkaline hydrolysis. Reduction of 60 with borohydride in methanol afforded 61, which was converted into 62 by successive condensation with acetone, meth-anesulfonylation, and azide exchange. The 4,5-diazido-3,4,5,6-tetra-deoxy-l,2-0-isopropylidene-L-ara/uno-hexitol (62) was reduced with hydrogen in the presence of Raney nickel, the resultant diamine was treated with phosgene in the presence of sodium carbonate, and the product was hydrolyzed under acidic conditions to give 63. The overall yield of 63 from 56 was 4%. The next three reactions (with sodium periodate, the Wittig reaction, and catalytic reduction) were performed without characterization of the intermediate products, and gave (+)-dethiobiotin methyl ester indistinguishable from an authentic sample thereof prepared from (+)-biotin methyl ester. 

SYNS ABIETIC ACID, METHYL ESTER METHYL ESTER of WOOD ROSIN METHYL ESTER of WOOD ROSIN, partially hydrogenated (FCQ... 

METHYL ESTER STEARIC ACID see MJWOOO METHYL ESTER of WOOD ROSIN see MFT500 METHYL ESTER of WOOD ROSIN, partially hydrogenated (FCC) see MFT500 METHYLE (SULFATE de) (FRENCH) see DUDIOO 4,4 - (1 -METHYL-1,2-ETHANEDIYL)BIS-2,6-PIPERAZINEDIONE see PIK250 METHYL ETHrVNE SULFONATE see MJW250 METHYL ETHANE SULPHONATE see MJW250... 

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