Addition of di-(trimethylsilyl)phosphite to<i>N</i>,<i>N</i>′-dialkyl terephthalic schiff bases: Synthesis of 1,4-phenylene-bis- (aminomethyl)-phosphonic acids
作者:Jarosław Lewkowski、Marek Dziȩgielewski
DOI:10.1002/hc.20569
日期:——
The addition of di-(trimethylsilyl)phosphite to N,N′-terephthalylidene-alkyl-(or aryl-)amines resulted in 1,4-phenylene-bis-(N-alkylamino- methyl)-phosphonicacids in moderate yields. The stereochemical behavior of such reactions was studied, and NMR studies demonstrated that, for several examples, this reaction led to the exclusive formation of only one diastereomeric form. The investigation of the
The Stereochemical Behavior of Terephthalic Schiff Bases in Addition of Dialkyl or Diaryl Phosphites
作者:Jarosław Lewkowski
DOI:10.1080/104265090508172
日期:2005.1.1
Abstract Addition of dialkyl (or diaryl) phosphites to N-alkyl terephthalic Schiffbases led exclusively to a meso-form but addition to N-aryl terephthalic Schiffbases depended on the substituent of the aryl group. Semi-empirical calculations were involved to find the reason of this phenomenon.
GRAPHICAL ABSTRACT ABSTRACT The addition of dimethyl phosphite to N,N'-terephthalylidene-alkyl- (or aryl-) amines resulted in new tetramethyl 1,4-phenylene-bis-(N-alkylaminomethyl)-phosphonates in moderate yields. The stereochemical behavior of these reactions was studied by NMR, demonstrating that the reactions lead to the formation of both possible diastereomeric forms from 1:1 to 1:2 ratios. This