PROBLEM TO BE SOLVED: To provide a method for synthesizing or producing efficiently a quinolylpyrrolopyrimidyl fused-ring compound which has an epidermal growth factor receptor (EGFR)-inhibiting activity.SOLUTION: This invention relates to a compound expressed by formula (1), or its salt. (Ris H, nitro, amino, hydroxy, ether, alkylthio, arylthio, etc.; Ris halogen, a hydroxyl group, quinolyl, etc.; Ris H or a protective group of an amino group; Ris aldehyde or a carboxyl group when n=0, or is halogen or a hydroxyl group when n=1; Ris an amino group or a protective group when a bond part is a single bond, or is oxo, imino, or =NRwhen the bond part is a double bond; and Ris aralkyl, acyl, alkyl sulfonyl, etc.).SELECTED DRAWING: None【課題】上皮成長因子受容体(EGFR)阻外作用を有するキノリルピロロピリミジル縮合環化合物を効率的に合成又は製造する方法の提供。【解決手段】式(1)で表される化合物又はその塩。(R1はH、ニトロ、アミノ、水酸、エーテル、アルキルチオ、アリールチオ等;R2はハロゲン、水酸基、キノリル等;R3はH又はアミノ基の保護基;R4はn=0の時、アルデド又はカルボキル基、n=1の時、ハロゲン又は水酸基;R5は結合部が単結合の時、アミノ基又は保護基、二重結合の時オキソ、イミノ又は=NRb;Rbはアラルキル、アシル、アルキルスルホニル等)【選択図】なし