109839-22-7Relevant academic research and scientific papers
Regioselectivity of Pyrrole Synthesis fromm Diethyl Aminomalonate and 1,3-Diketones: Further Observations
Paine, John B.,Brough, Jonathan R.,Buller, Kathy K.,Erikson, Erika E.
, p. 3986 - 3993 (1987)
1,3-Diketones 1 react with diethyl aminomalonate (2) in boiling acetic acid to afford ethyl 2-pyrrolecarboxylates 6.Considerable regioselectivity was noted for the following classes of diketone: 2-acylcyclohexanones 10a,b , 2-acylcyclopentanones 10c,d pyrroles 13a,b>, 1-phenyl-2-alkyl-1,3-alkanediones 17a-d , 3-phenyl-2,4-hexanedione (21a) , 1-phenyl-3-alkyl-2,4-alkanediones 24a,b , and 2,2-dimethyl-3,5-alkanediones 29a,b .The yields varied with the structural class, decreasing with increased steric hindrance.The product structure correlated with the structure of the enolized diketones in the case of the 2-acylcycloalkanones studied.
ARYL BETA DIKETONES AND THEIR USE A ODORANTS
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Page/Page column 14; 15, (2017/12/09)
The present invention refers to aryl beta diketones of the formula (I) wherein Y, R1, R2 and R3 have the same meaning as given in the description. The invention further refers to fragrance compositions and fragranced articles comprising them.
