(R)-tert-butyl 1-(4-(6-bromo-8-methoxy-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenyl)ethylcarbamate   、                                                                                      
三溴化硼                                                                                                                                                                                                                                                                                                          以to afford the desired product (18 mg, 88%) as a light grey solid的产率得到(R)-9-(4-(1-aminoethyl)phenyl)-6-bromo-8-hydroxythieno[2,3-c]quinolin-4(5H)-one