Abstract: The present invention provides industrially suitable processes for preparing intermediates in the production of substituted polycyclic pyridone derivatives having a cap-dependent endonuclease inhibitory activity.

Abstract: The present invention provides industrially suitable processes for preparing intermediates in the production of substituted polycyclic pyridone derivatives having a cap-dependent endonuclease inhibitory activity. In the process as shown below, wherein each symbol is as defined in the specification, an optically active substituted tricyclic pyridone derivative of the formula (VII) is obtained in high yield and high enantioselectivity by subjecting a compound of the formula (III) or (VI) to intramolecular cyclization with controlling stereochemistry to obtain a compound of the formula (IV) having a removable functional group on an asymmetric carbon, and then removing the functional group thereof.

Abstract: The present invention is related to a compound represented by formula (I), wherein X1, X2, X3, X4, X5, R5, R6, R7, R8, n, p, q, ring A and ring B are as described in the specification, or a pharmaceutically acceptable salt thereof.

Abstract: The present invention is related to a compound represented by formula (I) wherein R1 is a hydrogen atom, substituted or unsubstituted alkyl, substituted or unsubstituted aromatic carbocyclyl, or the like; X is —N(R3)—, —O—, or —S—; Y is ?C(R4)—, or ?N—; Z is —N(R7)—, —O—, or —S—; R2 is substituted or unsubstituted alkyloxy, or the like, or a group represented by the following formula: —(CR2aR2b)n—R2c, wherein R2a is each independently a hydrogen atom, halogen, or the like; R2b is each independently a hydrogen atom, halogen, or the like; R2a and R2b which are attached to the same carbon atom may be taken together to form oxo, a substituted or unsubstituted non-aromatic carbocycle, or the like; two of R2a which are attached to the adjacent carbon atoms and/or two of R2b which are attached to the adjacent carbon atoms may be taken together to form a bond; R2c is substituted or unsubstituted aromatic carbocyclyl, or the like; n is an integer from 1 to 3; R3 and R7 are each independently a hydrogen atom, subs

Abstract: The present invention is related to a compound represented by formula (I) wherein R1 is a hydrogen atom, substituted or unsubstituted alkyl, substituted or unsubstituted aromatic carbocyclyl, or the like; X is —N(R3)—, —O—, or —S—; Y is ?C(R4)—, or ?N—; Z is —N(R7)—, —O—, or —S—; R2 is substituted or unsubstituted alkyloxy, or the like, or a group represented by the following formula: —(CR2aR2b)n—R2c, wherein R2a is each independently a hydrogen atom, halogen, or the like; R2b is each independently a hydrogen atom, halogen, or the like; R2a and R2b which are attached to the same carbon atom may be taken together to form oxo, a substituted or unsubstituted non-aromatic carbocycle, or the like; two of R2a which are attached to the adjacent carbon atoms and/or two of R2b which are attached to the adjacent carbon atoms may be taken together to form a bond; R2c is substituted or unsubstituted aromatic carbocyclyl, or the like; n is an integer from 1 to 3; R3 and R7 are each independently a hydrogen atom, subs

Abstract: The present invention is related to a compound represented by formula (I) wherein R1 is a hydrogen atom, substituted or unsubstituted alkyl, substituted or unsubstituted aromatic carbocyclyl, or the like; X is —N(R3)—, —O—, or —S—; Y is ?C(R4)—, or ?N—; Z is —N(R7)—, —O—, or —S—; R2 is substituted or unsubstituted alkyloxy, or the like, or a group represented by the following formula: —(CR2aR2b)n—R2c, wherein R2a is each independently a hydrogen atom, halogen, or the like; R2b is each independently a hydrogen atom, halogen, or the like; R2a and R2b which are attached to the same carbon atom may be taken together to form oxo, a substituted or unsubstituted non-aromatic carbocycle, or the like; two of R2a which are attached to the adjacent carbon atoms and/or two of R2b which are attached to the adjacent carbon atoms may be taken together to form a bond; R2c is substituted or unsubstituted aromatic carbocyclyl, or the like; n is an integer from 1 to 3; R3 and R7 are each independently a hydrogen atom, sub

Abstract: The present invention is related to a compound represented by formula (I), wherein X1, X2, X3, X4, X5, R5, R6, R7, R8, n, p, q, ring A and ring B are as described in the specification, or a pharmaceutically acceptable salt thereof.