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
A new and mild procedure for the preparation of vinyl formamides from thiooximes
作者:J.E. Baldwin、D.J. Aldous、I.A. O'Neil
DOI:10.1016/s0040-4039(00)88913-3
日期:1990.1
Treatment of thiooximes with triphenylphosphine and acetic formic anhydride in dichloromethane at room temperature gives good yields of vinyl formamides under essentially neutral conditions.