(S)-ethyl 2-(2-aminopropylamino)-4-methylthiazole-5-carboxylate   、                                                                                      
(R)-ethyl 2-(1-aminopropan-2-ylamino)-4-methylthiazole-5-carboxylate                                                                                                                                                                                                                                                                                                          以the title compound was obtained as a colorless solid (86%)的产率得到(R)-ethyl 4-methyl-2-(5-methyl-2-oxoimidazolidin-1-yl)thiazole-5-carboxylate