Nitrogen-containing heterocyclic compound and method for producing same

A method for producing a compound represented by formula (11) comprising:

• a step of converting a compound represented by formula (9) into a compound represented by formula (10);
• and
• a step of reacting the compound represented by formula (10) with a halogenating agent to convert into the compound represented by formula (11):
• wherein each of R1 and R2 independently represents a hydrogen atom, or an unsubstituted or substituted alkyl group, and R1 and R2 may form a ring together,
• R6 represents an unsubstituted or substituted alkylcarbonyl group, an unsubstituted or substituted arylcarbonyl group, an unsubstituted or substituted heteroarylcarbonyl group, an unsubstituted or substituted alkoxycarbonyl group, an unsubstituted or substituted alkylsulfonyl group, or an unsubstituted or substituted arylsulfonyl group,
• R7 represents an unsubstituted or substituted alkylcarbonyl group, an unsubstituted or substituted arylcarbonyl group, an unsubstituted or substituted heteroarylcarbonyl group, an unsubstituted or substituted alkoxycarbonyl group, an unsubstituted or substituted alkylsulfonyl group, or an unsubstituted or substituted arylsulfonyl group,
• A represents a hydroxyl group, a thiol group, an amino group, a nitro group, a halogen atom or an organic group,
• X represents a halogen atom,
• m represents any one of integers of 1 to 4, and
• k represents any one of integers of 0 to 3,
• wherein k+m≦4.