对甲苯异氰酸酯   、                                                                                      (R)-methyl 2-(3-(4-aminophenyl)isoxazole-5-carbothioamido)-3-methylbutanoate                                                                                                                                                              在
                                                                                                                                                                                 
(R)-methyl 3-methyl-2-(3-(4-(3-p-tolylureido)phenyl)isoxazole-5-carbothioamido)butanoate                                                                                                                                  作用下,
                                                                                                                                                                                                                            以to yield 65% of the title compound的产率得到(R)-methyl 3-methyl-2-(3-(4-(3-p-tolylureido)phenyl)isoxazole-5-carbothioamido)butanoate