A Simple and Efficient Access to α-Amino Phosphonates from <i>N</i>-Benzyloxycarbonylamino Sulfones Using Indium(III) Chloride†Studies on Novel Synthetic Methodologies. 188.
作者:Biswanath Das、Kongara Damodar、Nisith Bhunia
DOI:10.1021/jo900558d
日期:2009.8.7
Treatment of N-benzyloxycarbonylamino sulfones with triethyl phosphite catalyzed by InCl3 produces the corresponding protected α-amino phosphonates in high yields (71−92%).
Mannich-type Reactions of in Situ Generated N-Acyliminium Ions from α-Amido p-Tolylsulfones with Silyl Enolates
作者:Sang-Hyeup Lee、Santosh T. Kadam
DOI:10.5012/bkcs.2011.32.10.3738
日期:2011.10.20
aliphatic aldehydes reactedwith silyl enol ether and silyl enol ester under mild reaction conditions to afford N-Cbz-protected β-aminoketones and N-Cbz-protected β-amino esters in moderate to good yield, respectively.Key Words : α-Amido p-tolylsulfone, Cbz-Protected β-amino ketone, N-Acyliminium ion, Mannich-type re-action IntroductionA Mannich and Mannich-typereactions are powerfulmethods for the synthesis
2-Naphthol underwent Friedel-Crafts reaction with N-benzyloxycarbonylamino sulfones in the presence of InCl3 at room temperature to form the corresponding sulfonyl derivatives in high yields. The products were subsequently reacted with nucleophiles such as allyltributyltin and anisole to replace the sulfonyl group.