A new synthesis of Tyrian purple (6,6'-dibromoindigo) and its corresponding sulfonate salts.

Holly Helmers, Mark Horton, Julie Concepcion, Jeffrey Bjorklund, Nicholas C Boaz

Abstract read

In one paragraph

Article in Beilstein journal of organic chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed

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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Holly Helmers *Department of Chemistry, North Central College, 121 S. Loomis Street, Naperville, IL 60540, USA.

Mark Horton *Department of Chemistry, North Central College, 121 S. Loomis Street, Naperville, IL 60540, USA.

Julie ConcepcionDepartment of Chemistry, North Central College, 121 S. Loomis Street, Naperville, IL 60540, USA.

Jeffrey BjorklundDepartment of Chemistry, North Central College, 121 S. Loomis Street, Naperville, IL 60540, USA.ORCID https://orcid.org/0009-0008-8314-606X

Nicholas C BoazDepartment of Chemistry, North Central College, 121 S. Loomis Street, Naperville, IL 60540, USA.ORCID https://orcid.org/0000-0002-4562-0233

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

6,6'-Dibromoindigo is the major component of a historic pigment, famous since ancient times, known as Tyrian purple. In this work, we report a new strategy for the synthesis of 6,6'-dibromoindigo in four steps from

Indexed as

6,6’-dibromoindigodyesulfonationsynthesisTyrian purple

Identifiers

PMID41602741

DOI10.3762/bjoc.22.10

PMCPMC12834052

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.