A novel synthesis of didehydroamino acid esters from azomethine ylides
作者:Paul W. Groundwater、Toqir Sharif、Andrea Arany、David E. Hibbs、Michael B. Hursthouse、Ian Garnett、Miklós Nyerges
DOI:10.1039/a803695k
日期:——
A novel synthesis of didehydroamino acid (DDAA) esters 5 is described, starting from aldimines 2. The mechanism for this reaction has been shown to involve the cycloaddition of an azomethine ylide 3 to an imine 2, followed by the base-catalysed ring-opening of the resulting imidazolidine intermediate 7. This novel method has also been extended to the synthesis of DDAA esters 5 catalysed by imines.
作者:Paul W. Groundwater、Toqir Sharif、Andrea Arany、David E. Hibbs、Michael B. Hursthouse、Miklòs Nyerges
DOI:10.1016/s0040-4039(97)10821-8
日期:1998.3
A novel synthesis of didehydroamino acid (DDAA) esters 4 is described, starting from aldimines 1. The mechanism for this reaction involves the cycloaddition of an azomethineylide 2 to an imine 1, followed by the base-catalysed ring-opening of the imidazolidine intermediate 6. This method has also been extended to the synthesis of DDAA esters 4h-j catalysed by an imine 1a.