rac-2-amino-3-[4-(1-ylooxy-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)phenyl]propionic acid ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 (R)-N-acetyl-2-phenylglycine                                                                                                                                  作用下,
                                                                                                                                                                                                                            以43.9%的产率得到2-amino-3-[4-(1-ylooxy-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)phenyl]propionic acid ethyl ester