Heteroarylpiperidines, pyrrolidines and piperazines and their use as antipsychotics and analgesics

1. A compound of the formula:

• whereinX is —
  
  O—
  
  or —
  
  S—
  
  ;
  
  p is 1 or 2;
  
  Y is hydrogen, lower alkyl, hydroxy, chlorine, fluorine, bromine, iodine, lower alkoxy, trifluoromethyl, nitro, or amino, when p is 1;
  
  Y is lower alkoxy, hydroxy and halogen when p is 2 and X is —
  
  O—
  
  ;
  
  (R₁) is R₂₀, R₂₁, or R₂₂, wherein;
  
  R₂₀ is —
  
  (CH₂)_n—
  
  where n is 2, 3, 4 or 5;
  
  R₂₁ is —
  
  CH₂—
  
  CH═
  
  CH—
  
  CH₂—
  
  , —
  
  CH₂—
  
  C≡
  
  C—
  
  CH₂—
  
  , —
  
  CH₂—
  
  CH═
  
  CH—
  
  CH₂—
  
  CH₂, —
  
  CH₂—
  
  CH₂—
  
  CH═
  
  CH—
  
  CH₂—
  
  , —
  
  CH₂—
  
  C≡
  
  C—
  
  CH₂—
  
  CH₂—
  
  , or —
  
  CH₂—
  
  CH₂—
  
  C≡
  
  C—
  
  CH₂—
  
  , the —
  
  CH═
  
  CH—
  
  bond being cis or trans;
  
  R₂₂ is R₂₀ or R₂₁ in which one or more carbon atoms of R₂₀ or R₂₁ are substituted by at least one C₁-C₆ linear alkyl group, pheny group or where Z₁ is lower alkyl, —
  
  OH, lower alkoxy, —
  
  CF₃, —
  
  NO₂, —
  
  NH₂ or halogen;
  
  R is hydrogen, lower alkyl, lower alkoxy, hydroxyl, carboxyl, chlorine, fluorine, bromine, iodine, amino, lower mono or dialkylamino, nitro, lower alkyl thio, trifluoromethoxy, cyano, acylamino, trifluoromethyl, trifluoroacetyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, formyl, —
  
  C(═
  
  O)-alkyl, —
  
  C(═
  
  O)—
  
  O-alkyl, —
  
  C(═
  
  O)-aryl, —
  
  C(═
  
  O)-heteroaryl, —
  
  CH(OR⁷)-alkyl, —
  
  C(═
  
  W)-alkyl, —
  
  C(═
  
  W)-aryl, and —
  
  C(═
  
  W)-heteroaryl;
  
  or —
  
  CH(OR₇)-alkyl;
  
  wherein alkyl is lower alkyl;
  
  aryl is phenyl or wherein R₅ is hydrogen, lower alkyl, lower alkoxy, hydroxy, chlorine, fluorine, bromine, iodine, lower monoalkylamino, lower dialkylamino, nitro, cyano, trifluoromethyl, or trifluoromethoxy;
  
  heteroaryl is wherein Q₃ is —
  
  O—
  
  , —
  
  S—
  
  , —
  
  NH—
  
  , or —
  
  CH═
  
  N—
  
  ;
  
  W is CH₂ or CHR₈ or N—
  
  R₉;
  
  R₇ is hydrogen, lower alkyl, or acyl;
  
  R₈ is lower alkyl;
  
  R₉ is hydroxy, lower alkoxy, or —
  
  NHR₁₀; and
  
  R₁₀ is hydrogen, lower alkyl, C₁-C₃ acyl, aryl, —
  
  C(═
  
  )-aryl or —
  
  C(═
  
  O)-heteroaryl, where aryl and heteroaryl are as defined above;
  
  andm is 1, 2, or 3;
  
  all geometric, optical and stereoisomers thereof, or a pharmaceutically acceptable acid addition salt thereof.