Method for preparing pyrrolopyrimidine compound and application thereof

A compound of formula I, or a pharmaceutically acceptable salt thereof,

• wherein,
• R1 is selected from the group consisting of H, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C6-C10 aryl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C4-C10 heterocyclic group, substituted or unsubstituted C1-C10 heteroaryl group, —RaC(O)Rb, —R1′—NRcC(O)Rb, and —R1′—N═CRcRb;
• and the substitution means having one or more substituents selected from the group consisting of substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C6-C10 aryl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C4-C10 heterocyclic group, substituted or unsubstituted C1-C10 heteroaryl, halogen, —NH2, —OH and —CN;
• each Ra and Rb is independently selected from the group consisting of hydrogen, —CN, substituted or unsubstituted C1-C8 alkyl, substituted or unsubstituted C2-C8 alkenyl, substituted or unsubstituted C3-C8 alkynyl, substituted or unsubstituted C6-C10 aryl group, substituted or unsubstituted C3-C10 cycloalkyl group, substituted or unsubstituted C4-C10 heterocyclic group, and substituted or unsubstituted C1-C10 heteroaryl group, and the substitution means having one or more substituents selected from the group consisting of halogen, amino, nitro, —OH, —CN, C1-C4 alkyl and C1-C4 haloalkyl;
• Re is H or C1-C3 alkyl group;
• R1′ is phenyl or cyclohexyl;
• wherein the C4-C10 heterocyclic group and the C1-C10 heteroaryl group each independently has 1 to 3 hetero atoms selected from the group consisting of N, O, and S.