氰基硼氢化钠   、                                                                                      7-(4-chlorobenzoyl)-5-(3-chlorophenyl)-1,3-dihydro-1-methyl-2H-1,4-benzodiazepin-2-one   、                                                                                         、                                                                                      
ammonium hydroxide                                                                                                                                                              在
                                                                                                                                                                                 
水   、                                                                                                  
magnesium sulfate   、                                                                                                  
7-(4-chlorobenzoyl)-5-(3-chlorophenyl)-1,3,4,5-tetrahydro-1-methyl-2H-1,4-benzodiazepin-2-one                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
溶剂黄146   、                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 4.5h,
                                                                                                                以yielding 8.25 g (85%) of 7-(4-chlorobenzoyl)-5-(3-chlorophenyl)-1,3,4,5-tetrahydro-1-methyl-2H-1,4-benzodiazepin-2-one (intermediate 8), mp. 177° C.的产率得到7-(4-chlorobenzoyl)-5-(3-chlorophenyl)-1,3,4,5-tetrahydro-1-methyl-2H-1,4-benzodiazepin-2-one