37945-37-2Relevant articles and documents
Porphyrins with Exocyclic Rings. 1. Chemistry of 4,5,6,7-Tetrahydro-1H-indoles: Synthesis of Acetoxy Derivatives, Dihydroindoles, and Novel Porphyrins with Four Exocyclic Rings
Lash, Timothy D.,Bladel, Karla A.,Shiner, Craig M.,Zajeski, Donna L.,Balasubramaniam, Rajiv P.
, p. 4809 - 4820 (2007/10/02)
A variety of 4,5,6,7-tetrahydro-1H-indoles (THI's) and 4-oxo-4,5,6,7-tetrahydro-1-indoles (4-oxoTHI's) have been synthesized from cyclohexanone and 1,3-cyclohexanedione, respectively.The THI's reacted regioselectively with lead tetraacetate in acetic acid
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 (2007/10/02)
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.