Dihydrojasmonic acid, methyl

Dihydrohaematinic acid, T22 f/Txm-dihydrohaematinimide, Y23 Dihydrohomopterocarpin, Y3 Dihydrojasmonic acid, methyl ester, A36... 

The chemical structures of the majority of FMs that have been studied in wastewater treatment are given in Figs. 1-3. Figure 1 shows a variety of FM structures that include alcohols, aldehydes, and ketones, including benzyl acetate (phenylmethyl ester acetic acid), methyl salicylate (2-hydroxy-methyl ester benzoic acid), methyl dihydrojasmonate (3-oxo-2-pentyl-methyl ester cyclopentaneacetic acid), terpineol (4-trimethyl-3-cyclohexene-1-methanol), benzyl salicylate (2-hydroxy-phenylmethyl ester benzoic acid), isobornyl acetate... 

Decenoic acid (143), easily prepared from the same telomer 142, was cyclized via acid chloride using A1C13 to give 2-pentyl-2-cyclopentenone (144). Michael addition of methyl malonate followed by removal of one ester group produced methyl dihydrojasmonate (145) (129) ... 

DIETHYLPHOSPHONOMETHYL-2,2-DIHETHYL-l, 3-DI0XEN-4-0NE, 66, 194-196, 202 Diethyl phthalimidomethylphosphonate Phosphonic acid, (phthalimidomethyl)-, diethyl ester Phosphonic acid, [(1,3-dihydro-l,3-d1oxo-2H-iso1ndol-2-yl)-methyl]-, diethyl ester (33512-26-4), 65, 119 DIHYDROJASMONE, 65, 26... 

Of the four possible optical isomers, the (+)-( I )-cw-isomer possesses the most characteristic jasmin odor. Methyl dihydrojasmonate is prepared by Michael addition of malonic acid esters to 2-pentyl-2-cyclopenten-l-one, followed by hydrolysis and decarboxylation of the resulting (2-pentyl-3-oxocyclopentyl) malonate, and esterification of the (2-pentyl-3-oxocyclopentyl)acetic acid [136]. 

Of all possible isomers, the (+)-(lR)-cis isomer possesses the most characteristic and intensive jasmine odor. Therefore, an industrially feasible process for the production of a methyl dihydrojasmonate with a high portion of this isomer has been developed. The process comprises the catalytic hydrogenation of the corresponding cyclopenteneacetic acid in the presence of a ruthenium(II) complex with chiral ligands and subsequent esterification [138]. 

Acetic acid, 2-pentyl-3-oxo-1-cyclopentyl-, methyl ester methyl dihydrojasmonate 172a, 174b, 1053, 3266 ... 

IR)-trans-Jasmonic acid) 62653-85-4 ((IR)-cis jasmonic acid) 24851-98-7 (methyl dihydrojasmonate)]... 

Sequential addition of methyl-lithium and phenylselenyl chloride to the double bond in (192) results in the selenyl derivative (193), which when treated with bromine and hydrogen peroxide yields (+)-Prelog-Djerassi lactonic acid (194). Similarly, addition of a methyl group to (195), by LiMezCu, and oxidative elimination of the phenylselenyl group provides a useful route to dihydrojasmone and c(5-jasmone as shown in Scheme 35. ... 

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