Practical Synthesis of N-Boc- and N-Cbz-α-Amido Stannanes from α-Amido Sulfones Using TMSSnBu3 and CsF
摘要:
In the presence of TMSSnBu3 and CsF, stannylation of N-Boc- and N-Cbz-alpha-amido sulfones proceeded very well to afford the corresponding alpha-amido stannanes in moderate-to-high yields. This reaction tolerated alpha-aryl-, alkenyl-, and alkyl-substituted alpha-amido sulfones as well as substrates containing either an ester or cyano moiety, which might be reactive with lithium or magnesium stannides employed in conventional stannylation.