21835-01-8Relevant articles and documents
High yield "one-pot" synthesis of 2-hydroxy-3-methylcyclopent-2-en-1-one and related compounds
Strunz, George M.,Lal, G. Sankar
, p. 572 - 573 (1982)
A convenient "one-pot" modification of a conventional synthetic route affords 2-hydroxy-3-methylcyclopent-2-en-1-one and related compounds in high overall yields.
Kende,Eilerman
, p. 697,698 (1973)
The effect of pH on the formation of aroma compounds produced by heating a model system containing l-ascorbic acid with l-threonine/l-serine
Yu, Ai-Nong,Zhang, Ai-Dong
experimental part, p. 214 - 219 (2011/12/14)
The identification of aroma compounds, formed from the reactions of l-ascorbic acid with l-threonine/l-serine at five different pH values (5.00, 6.00, 7.00, 8.00, or 9.55) and 143 ± 2 °C for 2 h, was performed using a SPME-GC-MS technique, and further use
Acetoacetic acid ester derivatives for the manufacture of α-hydroxycarbonyl compounds
-
, (2008/06/13)
The invention is concerned with a novel process for the manufacture of compounds of the formula STR1 wherein R1 signifies C1-5 -alkyl, especially methyl, ethyl, propyl or isopropyl, and the radicals R2 each independently represent hydrogen or C1-5 -alkyl, especially hydrogen or methyl, ethyl, propyl or isopropyl. The process is characterized in that a compound of the formula STR2 wherein R stands for C1-4 -alkoxy, chlorine, bromine or C1-4 -alkanoyloxy, R1 and R2 have the above significance and R3 represents C1-4 -alkyl. is hydrolyzed and subjected to an aldol condensation and, where R=C1-4 -alkoxy, the reaction product is subsequently subjected to an acid treatment. The compounds I are for the most part known flavoring substances.
