This invention provides novel compounds according to general formula (1) wherein A is a bicyclic or
tricyclic azepine derivative, V1 and V2 are both H, OMe or F, or one of V1 and V2 is Br, Cl, F, OH, OMe, OBn, OPh, O-acyl, N3, NH2, NHBn or NH-acyl and the other is H, or V1 and V2 together are ═O, —O(CH2)pO— or —S(CH2)pS—; W1 is either O or S; X1 and X2 are both H, or together are ═O or ═S; Y is OR5 or NR6R7; R1, R2, R3 and R4 are independently selected from H, lower
alkyl, lower alkyloxy, F, Cl and Br; R5 is selected from H and lower
alkyl; R6 and R7 are independently selected from H and lower
alkyl, or together are —(CH2)n—; n=3, 4, 5, 6; and p is 2 or 3. The compounds are agonists at the
vasopressin V2
receptor and are useful as antidiuretics and procoagulants. The invention further comprises pharmaceutical compositions incorporating these
vasopressin agonists, which compositions are particularly useful in the treatment of central
diabetes insipidus, nocturnal
enuresis and
nocturia.