2S-benzyloxycarbonylamino-3-methyl-butyric acid 5S-(3-carbamoyl-[1,2,4]triazol-1-yl)-3S,4S-bis-isobutyryloxy-tetrahydro-furan-2S-ylmethyl ester   、                                                                                      
对甲苯磺酸                                                                                                                                                              在
                                                                                                                                         palladium 10% on activated carbon                                                                                                                                                                                                                               
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以33%的产率得到2S-amino-3-methyl-butyric acid 5S-(3-carbamoyl-[1,2,4]triazol-1-yl)-3S,4S-bis-isobutyryloxy-tetrahydrofuran-2S-yl methyl ester; compound with toluene-4-sulfonic acid