93666-33-2Relevant academic research and scientific papers
SYNTHESIS AND REACTIONS OF FUROCONDENSED SYSTEMS CONTAINING INDOLE SKELETON
Korenova, Anna,Krutosikova, Alzbeta,Dandarova, Miloslava,Kovac, Jaroslav
, p. 1529 - 1535 (2007/10/02)
The new 1,2,4-triazolo-1,2,4-triazinopyrrolofuroindoles V and 1-acetyl-9H-pyrrolofuroindole (IX) were prepared from 1,9-dihydropyrrolofuroindole-2-carboxhydrazide I and 2-(2-nitrophenyl)-4H-furopyrrole-5-carboxylic acid, respectively.Compound I gave with triethyl orthoformate or with triethyl orthoacetate 1,2-dihydro-1,2,4-triazinopyrrolofuroindol-1-one or its methyl analogue II.Substances II afforded with phosphorus pentasulfide thiones IIIreacting with hydrazine to furnish IV.Cyclization of the latter with triethyl orthoformate or orthoacetate led to V.Compounds II and III can also be obtained by a deoxygenative cyclization of VI and VII with triethyl phosphite.
