[Cl:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]3[CH2:24][CH2:23][N:22]([CH3:25])[CH2:21][C:7]=3[N:8]2CC(C2C=NC(C)=CC=2)O)=[CH:4][CH:3]=1.ClC1C=C(NN)C=CC=1.COC(OC)CCCNC.ClC1C=C2C(C(CCNC)=CN2)=CC=1.C=O>>[Cl:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]3[CH2:24][CH2:23][N:22]([CH3:25])[CH2:21][C:7]=3[NH:8]2)=[CH:4][CH:3]=1Method for the preparation of compound 7 [[2-(7-chloro-2-methyl-3,4-dihydro-1H-pyrido[3,4-b]indol-9(2H)-yl)-1-(6-methylpyridin-3-yl)ethanol]: (3-chlorophenyl)hydrazine is reacted with 4,4-dimethoxy-N-methylbutan-1-amine (put in the references for this) to generate 2-(6-chloro-1H-indol-3-yl)-N-methylethanamine, which upon treatment with formaldehyde, under standard Pictet Spingler reaction conditions (insert the reference for this) gives 7-chloro-2-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole. The further reaction of this unsubstituted β-carboline with 2-methyl-5-(oxiran-2-yl)pyridine (carboline, aryl/heteroaryl oxide, NaH, DMF, 120° C.) gives the desired compound 2-(7-chloro-2-methyl-3,4-dihydro-1H-pyrido[3,4-b]indol-9(2H)-yl)-1-(6-methylpyridin-3-yl)ethanol, compound 7. After the successful synthesis of the compound, purification can be achieved using standard normal phase or reverse phase methods.
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