Synthetic studies related to diketopyrrolopyrrole (DPP) pigments. Part 3: Syntheses of tri- and tetra-aryl DPPs
作者:Richard L. Riggs、Colin J.H. Morton、Alexandra M.Z. Slawin、David M. Smith、Nicholas J. Westwood、William S.D. Austen、Katie E. Stuart
DOI:10.1016/j.tet.2005.09.005
日期:2005.11
Novel synthetic methodologies leading towards 2,3,5-triaryl- and 2,3,5,6-tetraaryl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-diones (tri- and tetra-aryl-DPPs) and their derivatives have been investigated. Direct arylation of 3,6-diphenyl-DPP was possible using 1-fluoro-2,4-dinitrobenzene. Acylation of ethyl 2-aryl-4,5-dihydro-5-oxopyrrole-3-carboxylates with N-arylbenzimidoyl chlorides in the presence of
导致2,3,5-三芳基和2,3,5,6-四芳基-2,5-二氢吡咯并[3,4- c ]吡咯-1,4-二酮(三和四芳基)的新型合成方法-DPPs及其衍生物。使用1-氟-2,4-二硝基苯可以将3,6-二苯基-DPP直接芳基化。N将N-酰化2-芳基-4,5-二氢-5-氧杂吡咯-3-羧酸乙酯在强碱存在下的-芳基苯甲酰亚胺基氯可得到新颖的2,3,6-三芳基-DPP和相应的未环化烯胺。一种新的简单的合成1,2-二芳基-4,5-二氢-5-氧杂吡咯-3-羧酸乙酯的方法,导致在碱性条件下通过与苄腈反应生成三芳基-DPP的另一种方法,以及苯并亚氨基酰氯方法可以实现各种取代的2,3,5,6-四苯基-DPP的合成。