A method for preparing a solid form of Compound 1 wherein the method comprises contacting a compound of Formula G with an acid optionally in a solvent followed by neutralization with a base; and wherein the method further comprises: (a) dissolving Compound 1 in a mixture of ethanol, water, and HCl at 45 °C; (b) neutralizing the mixture with NH 4 OH at 45 °C; and (c) filtering the mixture; or wherein the method further comprises: (d) dissolving Compound 1 in a mixture of 1-propanol, water, and HCl; (e) neutralizing the mixture with an aqueous base at from 45 °C to 60 °C; and (f) filtering the mixture; and further comprising recrystallizing Compound 1 from: i) N,N-dimethylformamide, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 9.8, 12.0 and 17.9 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; ii) methanol, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 7.5, 10.4 and 11.7 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; iii) a mixture of methanol and water or a mixture of ethanol and water, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 9.3, 11.7 and 19.9 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; iv) a mixture of dimethyl sulfoxide and methyl tertiary butyl ether or a mixture of dimethyl sulfoxide and ethyl acetate, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 11.0, 20.2 and 21.9 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; or v) a mixture of methanol and dichloromethane, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 9.3, 15.3 and 18.6 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; and wherein said compound of formula G is prepared by a method comprising contacting a compound of formula E with a compound of formula F, in the presence of palladium catalyst, a solvent and a base; and wherein said compound of formula E is prepared by a method comprising: 1) contacting a compound of formula D with a boron source and a palladium catalyst in the presence of a base in a solvent; 2) treating a solution of said compound of formula E with activated carbon; and 3) removing the activated carbon by filtration. (a) dissolving Compound 1 in a mixture of ethanol, water, and HCl at 45 °C; (b) neutralizing the mixture with NH 4 OH at 45 °C; and (c) filtering the mixture; or wherein the method further comprises: (d) dissolving Compound 1 in a mixture of 1-propanol, water, and HCl; (e) neutralizing the mixture with an aqueous base at from 45 °C to 60 °C; and (f) filtering the mixture; and i) N,N-dimethylformamide, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 9.8, 12.0 and 17.9 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; ii) methanol, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 7.5, 10.4 and 11.7 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; iii) a mixture of methanol and water or a mixture of ethanol and water, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 9.3, 11.7 and 19.9 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; iv) a mixture of dimethyl sulfoxide and methyl tertiary butyl ether or a mixture of dimethyl sulfoxide and ethyl acetate, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 11.0, 20.2 and 21.9 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; or v) a mixture of methanol and dichloromethane, wherein the solid form has an X-ray powder diffraction pattern comprising peaks at approximately 9.3, 15.3 and 18.6 (°2θ±0.2) measured using Cu Kα radiation at 1.54 Å; 1) contacting a compound of formula D with a boron source and a palladium catalyst in the presence of a base in a solvent; 2) treating a solution of said compound of formula E with activated carbon; and 3) removing the activated carbon by filtration.