3-tert-butyl-8-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-6-methyl-7-phenyl-2H-1,4-benzoxazine-5-carbonitrile                                                                                                                                                              在
                                                                                                                                                                                 
盐酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环   、                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                                                        以64%的产率得到3-tert-butyl-8-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-6-methyl-7-phenyl-2H-1,4-benzoxazine-5-carbonitrile hydrochloride