The reactions between the ynamino ketones (I) and ethylenediamine (II), ethanolamine (IV), o‐aminophenol (VIa) and o‐aminothiophenol (VIb) yield five‐membered heterocycles with two heteroatoms, viz the derivatives (III), (V) and (VII), whereas o‐phenylenediamine (VIII) affords the diazepine derivatives (IX).
Die carboxylierten Vinylacetylene (I) und (II) werden in Tetrachlorkoh1enstoff an der Doppel‐ und an der Dreifachbindung zu (III) und (V) bzw. (IV) und (VI) bromiert.
ChemInform Abstract Reaction of the phosphonates (I) with the nucleophilic reagents (II), containing a primary amino group and a second nucleophilic centre, yields the phosphorylated benzimidazoles or benzoxazoles (III). The dihydrooxazoles (V) are obtained from (I) and ethanolamine (IV) in an analogous manner. (Mechanism).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.