Heterocyclic and phenyl compounds.

A compound of formula (i)r-s(o)nch2ch2ch=cf2, or a salt thereof, wherein n is 0, 1 or 2; and r is a group of formulae (ii)to (xxi), wherein: the s ch2ch2ch=cf2 group is at least one of r1 (when attached to a carbon atom). R2, r3, r4, r5 or r6; r1 (when attached to a ca atom)r2, r3 r4, r5 and r6 are each independently hydrogen, optionally substituted alkyl, optionally substituted alkenyl, alkynyl, cycloalkyl, alkylcycloalkyl, alkoxy, alkenyloxy, alkynyloxy, hydroxyalkyl, alkoxyalkyl, optionally substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl, optionally substituted heteroarylalkyl, optionally substituted aryloxy, optionally substituted arylalkoxy, optionally substituted aryloxyalkyl, optionally substituted heteroaryloxy, optionally substituted heteroarylalkoxy, optionally substituted heteroaryloxyalky, haloalkyl, haloalkenyl, haloalkynyl, haloalkoxy, haloalkenyloxy, haloalkynyloxy, halogen, hydroxy, cyano, notro, -nr7r8, -nr7cor8, -nr7csr8, -nr7so2r8 ...