Vinyl isonitriles in radical cascade reactions: formation of cyclopenta-fused pyridines and pyrazines
作者:Isabelle Lenoir、Marie L. Smith
DOI:10.1039/a908630g
日期:——
The 4 + 1 radical annulation reaction of vinyl isonitriles with iodoalkynes or iodonitriles affording cyclopenta-fused pyridines and pyrazines respectively and the first example of an intramolecular radical addition to an aryl isonitrile are described.
[EN] PRECUSORS FOR PNA-MONOMERS<br/>[FR] PRECURSEUR POUR MONOMERES DE PNA
申请人:MARTENS JUERGEN
公开号:WO2000002864A1
公开(公告)日:2000-01-20
The invention is directed to compounds of formula (I) wherein A, B, D, E, X and Y are defined in the description. These compounds are useful precursors for the synthesis of monomers for Peptide Nucleic Acids (PNA).
Multicomponent synthesis of novel amino acid–nucleobase chimeras: a versatile approach to PNA-monomers
paper describes a multicomponent approach to novel totally protected precursors of PNA-monomers viaUgi 4CC. The obtained bisamides are converted into several partially protected PNA-monomers or derivatives thereof using three different procedures. Methods for hydrolysis are shown to be dependent on the nature of the isocyano component required for Ugi 4CC. Several novel monomers suitable for oligomer