Process for preparing diketopyrrolopyrrole derivatives

Details Process for preparing diketopyrrolopyrrole derivatives Process for preparing diketopyrrolopyrrole derivatives

C - Chemistry, Metallurgy

09

B

C09B 57/00 (2006.01) C07D 487/04 (2006.01) C07D 519/00 (2006.01) C09B 48/00 (2006.01) C09D 7/14 (2006.01)

Patent

CA 2206756

This disclosure relates to a process for preparing bis(hydroxymethyl)pyrrolopyrrole compounds of the formula (see fig. I) wherein A1 and A2 are aryl radicals, by reacting a 1,4-diketopyrrolopyrrole withformaldehyde or paraformaldehyde. The compound of formula (II) can be isolated or further reacted in a one pot synthesis to yield a compound of the formula (see fig. II) wherein B1 and B2 are organic radicals.

Cette découverte concerne un procédé permettant de préparer des composés de bis(hydroxyméthyl)pyrrolopyrrole selon une formule (voir fig. I) où A1 et A2 sont des radicaux aryliques, en faisant réagir un 1,4-diketopyrrolopyrrole avec de la formaldéhyde ou de la paraformaldéhyde. On peut isoler le composé de formule II ou le faire réagir selon une synthèse à pot unique afin d'obtenir un composé suivant une formule (voir fig. II) où B1 et B2 sont des radicaux organiques.

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