Methods of utilizing arylpiperazine derivatives

A compound of Formula 1:

• or a pharmaceutically acceptable salt, isomer, racemate, diastereomeric mixture thereof,
• wherein:
• A is —(CH2)n—, —O—(CH2)n—, —S—(CH2)n—, —S(O)(O)—(CH2)n—, —NH—(CH2)n—, —CH2—O—(CH2)n—, —(CH2)n—O—CH2—CH2—, —CH2—S—(CH2)n—, —(CH2)n—S—CH2—CH2—, —CH2—S(O)(O)—(CH2)n—, —(CH2)n—S(O)(O)—CH2—CH2—, —O—C(O)—(CH2)n—, —S—C(O)—(CH2)n—, —NH—C(O)—(CH2)n—, —CH2—C(O)—O—(CH2)n—, —CH2—C(O)—NH—(CH2)n—, —CH2—C(O)—S—(CH2)n—, —(CH2)n—C(O)—O—CH2—CH2—, —(CH2)n—C(O)—NH—CH2—CH2—, —(CH2)n—C(O)—S—CH2—CH2—, —CH2—O—C(O)—(CH2)n—, —CH2—NH—C(O)—(CH2)n—, —CH2—S—C(O)—(CH2)n—, —(CH2)n—O—C(O)—CH2—CH2—, (CH2)n—NH—C(O)—CH2—CH2—, or (CH2)n—S—C(O)—CH2—CH2—, wherein n is an integer from 1 to 7;
• B is O, S, S(O)(O), or NR5;
• and
• R1, R2, R3, R4, R5, R6, R7, and R8 are independently hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl, substituted heteroarylalkyl, acylalkyloxycarbonyl, acyloxyalkyloxycarbonyl, acylalkyloxycarbonylamino, acyloxyalkyloxycarbonylamino, alkoxy, alkoxycarbonyl, alkoxycarbonylalkoxy, alkoxycarbonyllalkylamino, alkylsulfinyl, alkylsulfonyl, alkylthio, amino, alkylamino, arylalkylamino, dialkylamino, arylalkoxy, arylalkoxycarbonylalkoxy, arylalkoxycarbonylalkylamino, aryloxycarbonyl, aryloxycarbonylalkoxy, aryloxycarbonylalkylamino, carboxy, carbamoyl, carbamate, carbonate, cyano, halogen, heteroaryloxycarbonyl, hydroxy, phosphate, phosphonate, sulfate, sulfonate, or sulfonamide;
• wherein R1, R2, R3, R4, R6, R7 and R8 and A are optionally substituted with isotopes selected from the group consisting of 2H (deuterium), 3H (tritium), 13C, 36Cl, 18F, 15N, 17O, 18O, 31P, 32P, and 35S.