Ti-direct, powerful, stereoselective aldol-type additions of esters and thioesters to carbonyl compounds: application to the synthesis and evaluation of lactone analogs of jasmone perfumes
thiophenyl esters or thioaryl esters with aldehydes and ketones was performed (total 46 examples). The present method is advantageous from atom-economical and cost-effective viewpoints; good to excellent yields, moderate to good syn-selectivity, substrate variations, reagent availability, and simple procedures. Utilizing the present reaction as the key step, an efficient short synthesis of three lactone
Penicillin Acylase-Mediated Synthesis of 2-Acetyl-1-pyrroline and of 2-Propionyl-1-pyrroline, Key Roast-Smelling Odorants in Food. Inclusion Complexes with β-Cyclodextrin and Their NMR and MS Characterization
作者:Tito Fabrizio Favino、Giovanni Fronza、Claudio Fuganti、Daniela Fuganti、Piero Grasselli、Andrea Mele
DOI:10.1021/jo961474c
日期:1996.1.1
The synthesis of the strong natural roast odorants 1 and 2 is achieved from the C-6 isomeric alcohols 16 and 21 via the acetylenic C-6 and C-7 amines 8 and 9. Key step in the process is the hydrolysis of the N-phenylacetamides 12 and 13 by means of immobilized penicillin acylase, which affords the 1-amino-4,5-diketones 14 and 15, spontaneously ring closing to 1 and 2. These latter compounds form inclusion
157. Experiments on the synthesis of the pyrethrins. Part VIII. Stereochemistry of jasmone and identity of dihydropyrethrone
作者:Leslie Crombie、Stanley H. Harper
DOI:10.1039/jr9520000869
日期:——
Immunotherapeutic Agent
申请人:Rosa Brunet Laura
公开号:US20080004341A1
公开(公告)日:2008-01-03
The invention relates to a compound which is an ester of 1,2,3-propanetriol with one or more C
11
to C
24
fatty acids, wherein at least one fatty acid has at least one double bond. The compound is useful in the treatment of chronic inflammatory disorders.