scholarly journals Flavouring Group Evaluation 55 (FGE.55): Consideration of phenyl-substituted aliphatic alcohols and related aldehydes and esters evaluated by JECFA (63rd meeting) structurally related to phenethyl alcohol, aldehyde, esters and related phenylacetic acid es

EFSA Journal ◽  
2008 ◽  
Vol 6 (3) ◽  
pp. 638 ◽  
Author(s):  
Keyword(s):  
Phenylacetic Acid ◽  
Aliphatic Alcohols ◽  
Phenethyl Alcohol ◽  
Group Evaluation

Catabolism of L-phenylalanine by some microorganisms of cheese origin

1984 ◽  
Vol 51 (3) ◽  
pp. 461-469 ◽  
Author(s):  
Chang-Won Lee ◽  
Jean Richard
Keyword(s):  
Phenylacetic Acid ◽  
Geotrichum Candidum ◽  
Exponential Growth Phase ◽  
Bacterial Isolates ◽  
Phenylpyruvic Acid ◽  
Brevibacterium Linens ◽  
Cheese Ripening ◽  
Phenethyl Alcohol ◽  
Yeast Strains ◽  
Camembert Cheese

SummaryThe ability of 42 microorganisms isolated from cheese, including strains of yeasts,Geotrichum candidum, Arthrobacter, Moraxellaspp.,Brevibacterium linensandStaphylococcus saprophyticusspp. to produce phenethyl alcohol (PEA) from L-phenylalanine was studied. All the yeast strains produced labelled PEA from L-[U-14C]phenylalanine. Phenylpyruvic acid was detected as an intermediate of PEA production and CO2was produced by decarboxylation of this acid. For five strains tested, the level of PEA which had accumulated in the culture at the end of exponential growth phase represented 39–52% of the L-Phe added. None ofG. candidumstrains nor bacterial isolates produced PEA from L-Phe. Strains ofMoraxellaspp. and four strains of theS. saprophyticusgroup produced phenylacetaldehyde. For three strains ofArthrobacterspp., five ofB. linensand all theMoraxella,14CO2produced from uniformly labelled L-Phe represented more than one carbon atom of the L-Phe molecule, suggesting that Phe was catabolized beyond the stage of phenylacetic acid. Production and disappearance of PEA during Camembert cheese ripening is probably related to the metabolic activity of microorganisms present at the cheese surface.

Notiz zu einer Reaktion von Alkoholen mit dem phasentransfer-katalytischen Dichlorcarbensystem (Anwendungen der Phasentransfer-Katalyse, Teil 36 [1]) / Notice on a Reaction of Alcohols with the Phase Transfer Catalytic Dichlorocarbene System (Applications of Phase Transfer Catalysis, Part 36 [1])

1987 ◽  
Vol 42 (6) ◽  
pp. 796-798 ◽  
Author(s):  
Eckehard V. Dehmlow ◽  
Rainer Neuhaus
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Aliphatic Alcohols ◽  
Phenethyl Alcohol ◽  
Ortho Esters

Abstract 1.2-Dialkoxytetrachlorocyclopropanes, ortho Esters Primary aliphatic alcohols and HCCl 3 /NaOH/ catalyst yield stereoisomeric 1,2-dialkoxytetra-chlorocyclopropanes 4 and 5, benzyl and phenethyl alcohol give orthoformates (1). Compounds 4 suffer rearrangement/hydrolysis at 120 °C yielding 3-alkoxv-2,3-dichloroacrylates (6).

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