342405-28-1Relevant articles and documents
A convenient access to 1,3-disubstituted furo[3,4-b]indoles by acid ion-exchange resin-catalyzed furan formation
Basset, Joan,Romero, Manel,Serra, Tha?s,Pujol, M. Dolors
, p. 356 - 362 (2012/01/06)
Efficient synthesis of furo[3,4-b]indoles starting from the corresponding indole is reported. The first route involves derivatization, protection, and deprotection steps, which stretch the syntheses. The second method provides a shorter and more efficient strategy to accessing the furoindole. The innovation starts with alkylation at C-2 of the indole presenting at the C-3 position a ketone-acetal, followed by the cycloaromatization catalyzed by polymeric ion-exchange resins. The second route represents a significant improvement over other methods previously described.
Novel indole derivatives, preparation thereof as medicinal products and pharmaceutical compositions, and especially as KDR inhibitors
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Page 22, (2008/06/13)
The invention relates to compounds of formula (I): in which R1 represents pyrazolyl or indazolyl, R2 and R3 especially represent H, halogen, hydroxyl, nitro, cyano, R4, —OR4, —COR4, —OC(═O)R4, —C(═O)OR4, —C(═O)OH, —N(R5)C(═O)R4, —N(R5)C(═O)OR4, —S(O)nR4, —S(O)nOR4, —N(R5)SO2R4, —NY1Y2, —C(═O)NY1Y2, —N(R5)C(═O)NY1Y2, —S(O)nNY1Y2 and —OC(═O)NY1Y2, R4 especially represents alkyl, alkenyl, cycloalkyl, aryl, heteroaryl and heterocycloalkyl, R5 especially represents H, alkyl, alkenyl, cycloalkyl, heterocycloalkyl, aryl and heteroaryl, Y1 and Y2 especially represent H, alkyl, alkenyl, cycloalkyl, heterocycloalkyl, aryl, arylcarboxyl, heteroaryl and heteroarylcarboxy, which are optionally substituted, or Y1 and Y2 form with N an amino ring, n represents 0 to 2, all these radicals being optionally substituted, these products being in all the isomeric forms and the salts, as medicinal products, especially as KDR inhibitors.
