Stereoselective synthesis of β-amino nitriles and 1,3-diamines
作者:Manfred T. Reetz、Frank Kayser、Klaus Harms
DOI:10.1016/s0040-4039(00)78493-0
日期:1994.11
Chiral beta-N,N-dibenzylamino nitriles Bn(2)NCH(R)CH2CN, prepared in enantiomerically pure form from alpha-amino acids, can be deprotonated and stereoselectively alkylated to afford beta-amino nitriles Bn(2)NCH(R)CH(R')CN with two stereogenic centers. LiAlH4-reduction leads to the corresponding 1,3-diamines.
Treatment of <i>N,N</i>-Dibenzylamino Alcohols with Sulfonyl Chloride Leads to Rearranged β-Chloro Amines, Precursors to β-Amino Acids, and Not to Tetrahydroisoquinolines
作者:Klaus Weber、Stephan Kuklinski、Peter Gmeiner
DOI:10.1021/ol991402i
日期:2000.3.1
treatment with tosyl chlorides induced intramolecular Friedel-Crafts alkylation. Reexamination of the reactions in our laboratory clearly proved rearranged chloro amines instead of the initially assumed tetrahydoisoquinoline structures. The chloro amines investigated can be employed as highly useful intermediates for an EPC synthesis of beta-amino nitriles and beta-amino acids.