6009-46-7Relevant articles and documents
New and general nitrogen heterocycle synthesis: Use of heteropoly acids as a heterogeneous recyclable catalyst
Hekmatshoar, Rahim,Sadjadi, Sodeh,Sadjadi, Samaheh,Heravi, Majid M.,Beheshtiha, Yahya S.,Bamoharram, Fatemeh F.
experimental part, p. 1708 - 1716 (2010/07/15)
An efficient synthetic method of six-and five-member nitrogen heterocyclic compounds was developed. Nitrogen heterocyclic compounds were prepared by condensation of the-dicarbonyl compounds with the corresponding-or-amino alcohols, subsequent cyclization, and spontaneous aromatization in the presence of a catalytic amount of Keggin-type heteropoly acids under very mild conditions. Copyright
Synthesis of functionalized pyrroles and 6,7-dihydro-1H-indol-4(5H)-ones by reaction of 1,3-dicarbonyl compounds with 2-azido-1,1-diethoxyethane
Bellur, Esen,Langer, Peter
, p. 2151 - 2154 (2007/10/03)
The condensation of 1,3-dicarbonyl compounds with 2-azido-1,1- diethoxyethane and subsequent cyclization allowed an efficient synthesis of a variety of pyrroles and 6,7-dihydro-1H-indol-4(5H)-ones.
Versatility of Weinreb amides in the Knorr pyrrole synthesis
Alberola, Angel,Ortega, Alfonso Gonzalez,Sadaba, M. Luisa,Sanudo, Carmen
, p. 6555 - 6566 (2007/10/03)
N-Methoxy-N-methyl-α-enaminocarboxamides were prepared starting from enamines and Weinreb α-aminoamides. Their reaction with oganometallic compounds and subsequent cyclization constitute a versatile alternative in the Knorr pyrrole synthesis.
