Fremgangsmåde til fremstilling af 2-aryl-5-(perfluoralkyl)pyrrolforbindelser ud fra N-(perfluoralkylmethyl)arylimidoylchloridforbindelser

Preparation of 2-aryl-5-(perfluoroalkyl)pyrrole derivatives of formula (I), comprises reacting an N-(perfluoroalkylmethyl)arylimidoyl chloride derivative of formula (II), with a dieneophile of formula (III), or an alpha ,beta -dihalo compound of formula (IV), and a base, in the presence of a solvent. (A)(Cl)C=NCH2CnF2n+1 (II); (W)CH=C(Y)(Z) (III); (Z)(W)CH-CH(Y)(Z) (IV). W = H or CmF2m+1; Y = CN, NO2 or CO2R; R = 1-4C alkyl; m, n = 1-8; A = a group of formula (i) or (ii); L = H or halo; M, Q = H, halo, CN, NO2, 1-4C alkyl, 1-4C haloalkyl, 1-4C alkoxy, 1-4C haloalkoxy, 1-4C alkylthio, 1-4C haloalkylthio, 1-4C alkylsulphinyl, 1-4C haloalkylsulphinyl, 1-4C alkylsulphonyl, 1-4C haloalkylsulphonyl; or adjacent M+Q = OCH2O, OCF2O, or CH=CH-CH=; R1-R3 = H, halo, NO2, or CHO; R2+R3 = C(R4)=C(R5)-(R6)=C(R7); R4-R7 = H, halo, CN or NO2; X = O or S; and Z = Cl, Br or I.