Pyrazolo compounds and uses thereof

A composition comprising a compound of formula I:

• or a pharmaceutically acceptable salt thereof, wherein:
• R1 is —R, halogen, —OR, —SR, —N(R′)2, —CN, —NO2, —C(O)R, —CO2R, —C(O)N(R′)2, —C(O)SR, —C(O)C(O)R, —C(O)CH2C(O)R, —C(S)N(R′)2, —C(S)OR, —S(O)R, —SO2R, —SO2N(R′)2, —N(R′)C(O)R, —N(R′)C(O)N(R′)2, —N(R′)SO2R, —N(R′)SO2N(R′)2, —N(R′)N(R′)2, —N(R′)C(═N(R′))N(R′)2, —C═NN(R′)2, —C═NOR, —C(═N(R′))N(R′)2, —OC(O)R, or —OC(O)N(R′)2;
• each R is independently hydrogen or an optionally substituted group selected from C1 aliphatic, phenyl, a 3-7 membered saturated or partially unsaturated carbocyclic ring, an 8-10 membered bicyclic saturated, partially unsaturated or aryl ring, a 5-6 membered monocyclic heteroaryl ring having 1-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, a 4-7 membered saturated or partially unsaturated heterocyclic ring having 1-2 heteroatoms independently selected from nitrogen, oxygen, or sulfur, a 7-10 membered bicyclic saturated or partially unsaturated heterocyclic ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or an 8-10 membered bicyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur;
• each R′ is independently —R, —C(O)R, —CO2R, or two R′ on the same nitrogen are taken together with the intervening nitrogen to form a 4-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from nitrogen, oxygen, and sulfur;
• Ring A is
• R2 and R3 are independently —R, halogen, —OR, —SR, —N(R′)2, —CN, —NO2, —C(O)R, —CO2R, —C(O)N(R′)2, —C(O)SR, —C(O)C(O)R, —C(O)CH2C(O)R, —C(S)N(R′)2, —C(S)OR, —S(O)R, —SO2R, —SO2N(R′)2, —N(R′)C(O)R, —N(R′)C(O)N(R′)2, —N(R′)SO2R, —N(R′)SO2N(R′)2, —N(R′)N(R′)2, —N(R′)C(═N(R′))N(R′)2, —C═NN(R′)2, —C═NOR, —C(═N(R′))N(R′)2, —OC(O)R, or —OC(O)N(R′)2;
• or:
• R2 and R3 are taken together with their intervening atoms to form an optionally substituted 5-7 membered partially unsaturated or aromatic fused ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, and sulfur;
• R2′ is —R, —OR, —SR, —N(R′)2, —C(O)R, —CO2R, —C(O)N(R′)2, —C(O)SR, —C(O)C(O)R, —C(O)CH2C(O)R, —C(S)N(R′)2, —C(S)OR, —S(O)R, —SO2R, —SO2N(R′)2, —N(R′)C(O)R, —N(R′)C(O)N(R′)2, —N(R′)SO2R, —N(R′)SO2N(R′)2, —N(R′)N(R′)2, —N(R′)C(═N(R′))N(R′)2, —C═NN(R′)2, —C═NOR, —C(═N(R′))N(R′)2, —OC(O)R, or —OC(O)N(R′)2;
• or:
• R2′ and R3 are taken together with their intervening atoms to form an optionally substituted 5-7 membered partially unsaturated or aromatic fused ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, and sulfur;
• X is —N(R4)—, —O—, or —S—;
• R4 is —R, —C(O)R, —CO2R, or —S(O)2R;
• or:
• R4 and R3 are taken together with their intervening atoms to form an optionally substituted 5-7 membered saturated, partially unsaturated, or aromatic fused ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, and sulfur;
• R5 is R, —C(O)R, —CO2R, —C(O)N(R′)2, —C(O)C(O)R, or —C(O)CH2C(O)R;
• or:
• R5 and R2 are taken together with their intervening atoms to form an optionally substituted 5-7 membered partially unsaturated or aromatic fused ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, and sulfur;
• R6 is —R, halogen, —OR, —SR, —N(R′)2, —CN, —NO2, —C(O)R, —CO2R, —C(O)N(R′)2, —C(O)SR, —C(O)C(O)R, —C(O)CH2C(O)R, —C(S)N(R′)2, —C(S)OR, —S(O)R, —SO2R, —SO2N(R′)2, —N(R′)C(O)R, —N(R′)C(O)N(R′)2, —N(R′)SO2R, —N(R′)SO2N(R′)2, —N(R′)N(R′)2, —N(R′)C(═N(R′))N(R′)2, —C═NN(R′)2, —C═NOR, —C(═N(R′))N(R′)2, —OC(O)R, or —OC(O)N(R′)2;
• or:
• R6 and R3 are taken together with their intervening atoms to form an optionally substituted 5-7 membered partially unsaturated or aromatic fused ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, and sulfur;
• and a pharmaceutically acceptable adjuvant, carrier, or vehicle.