Synthesis of Symmetric meso-H-Dipyrrin Hydrobromides from 2-Formylpyrroles
摘要:
The reaction of 2-formylpyrroles in acidic methanol gives the corresponding symmetric, meso-H-4,6-dipyrrin hydrobromides. This convenient strategy involves initial deformylation under the acidic conditions, followed by immediate in situ reaction of the resulting alpha-free pyrrole with the remaining 2-formylpyrrole in solution to give the dipyrrin hydrobromide salt in good yield.
[EN] THERAPY AND PHARMACEUTICAL COMPOSITION<br/>[FR] THÉRAPIE ET COMPOSITION PHARMACEUTIQUE
申请人:UNIV SOUTHAMPTON
公开号:WO2017077307A1
公开(公告)日:2017-05-11
A novel class of compounds called perenosins, and their use in the treatment and/or prevention of cancer or a neoplastic condition.
一种名为perenosins的新型化合物类别,以及它们在治疗和/或预防癌症或肿瘤病症中的应用。
Synthesis and reactivity of 2-thionoester pyrroles: a route to 2-formyl pyrroles
作者:Min Joon Kim、Sophie M. Gaube、Michael H. R. Beh、Craig D. Smith、Alison Thompson
DOI:10.1039/c9ra07527e
日期:——
2-Functionalised pyrroles exhibit considerable synthetic utility. Herein, the synthesis and reactivity of 2-thionoester (–C(S)OR) pyrroles is reported. 2-Thionoester pyrroles were synthesised using a Knorr-type approach from aliphatic starting materials. 2-Thionoester pyrroles were reduced to the corresponding 2-formyl pyrroles, or the deuterated formyl variant, in one step using RANEY® nickel, thereby
Influence of B-ring modifications on proton affinity, transmembrane anion transport and anti-cancer properties of synthetic prodigiosenes
作者:Estelle Marchal、Soumya Rastogi、Alison Thompson、Jeffery T. Davis
DOI:10.1039/c4ob01399a
日期:——
We describe how modulating the pKaof a family of synthetic prodigiosenes, modified on their B-ring, can control the transmembrane transport of anions.
我们描述了如何调节一系列合成红色素家族的pKa,通过修改它们的B环,可以控制阴离子的跨膜转运。
Brown, David; Griffiths, David; Rider, Margaret E., Journal of the Chemical Society. Perkin transactions I, 1986, p. 455 - 464
作者:Brown, David、Griffiths, David、Rider, Margaret E.、Smith, Rodney C.
DOI:——
日期:——
Synthetic prodigiosenes and the influence of C-ring substitution on DNA cleavage, transmembrane chloride transport and basicity
作者:Soumya Rastogi、Estelle Marchal、Imam Uddin、Brandon Groves、Julie Colpitts、Sherri A. McFarland、Jeffery T. Davis、Alison Thompson
DOI:10.1039/c3ob40477c
日期:——
Analogues of the tripyrrolic natural product prodigiosin bearing an additional methyl and a carbonyl group at the C-ring were synthesised and evaluated. In vitro anticancer activity screening (NCI) and the study of modes of action (copper-mediated cleavage of double-stranded DNA and transmembrane transport of chloride anions) showed that the presence of the methyl group is not detrimental to activity. Furthermore, although the presence of an ester conjugated to the prodigiosene C-ring seems to decrease both pKa and chloride transport efficiency compared to the natural product, these analogues still exhibit a high rate of chloride transport. All analogues exhibit good in vitro anticancer activity and reduced toxicity compared to the natural product: compare an acute systemic toxicity of 100 mg kg−1 in mice vs. 4 mg kg−1 for prodigiosin, pointing towards a larger therapeutic window than for the natural product.