Nucleophilic Carbene-Mediated Hydrophosphonylation of Aldimines
作者:Guang-Fen Du、Lin He、Zhi-Hua Cai、Bin Dai
DOI:10.1055/s-0031-1289690
日期:2012.3
Aldimines undergo efficient hydrophosphonylation reactions with dimethyl phosphite in the presence of nucleophilic heterocyclic carbenes (NHCs) as organocatalysts to give the corresponding (α-aminoalkyl)phosphonates in moderate-to-excellent yields.
Treatment of N-tosyl aldimines with dialkyl trimethylsilyl phosphites at 0 degrees C in the presence of iodine as a catalyst afforded the corresponding sulfonamide phosphonates in excellent yields within 1.5 to 2.5 h.
Amberlyst-15–Catalyzed Facile Synthesis of <font>α</font>-Amino Phosphonates
[image omitted] A simple and efficient method has been developed for the synthesis of sulfonamide phosphonates from N-tosyl aldimines and dimethyl trimethylsilyl phosphite at 0 degrees C in the presence of Amberlyst-15 as a heterogeneous catalyst.
Hydrophosphonylation of Aldimines under Catalysts‐Free Conditions
作者:Zhihua Cai、Yecheng Fan、Guangfen Du、Lin He
DOI:10.1002/cjoc.201200119
日期:2012.7
Trimethylsilyl phosphite reacted with aldimines efficiently undercatalysts‐freeconditions, giving α‐aminophosphonates in good to excellent yields. Furthermore, the reaction can be scaled‐up easily and the high yield can be maintained.