Selectively C-deuterated indigotins were synthesized from halogenated indigotins la-e as precursors. The described reactions - used already by the ancient purple dyers - allowed the introduction of D-atoms at defined positions of the indigo molecule. The exchange of halogen atoms by D-atoms was induced by UV irradiation of the leuco compounds 2a-c and 3a-c in D2O. The resulting leuco forms Ja-e were oxidized to the deuterated indigotins 5a-c. Some conclusions were drawn as to the kinetics of the reaction. The physical properties of the new compounds were determined.
Protecting group chemistry for clean, reductant-free dyeing
申请人:The Regents of the University of California
公开号:US10704070B2
公开(公告)日:2020-07-07
The present disclosure relates to the biosynthesis of indigoid dye precursors and their conversion to indigoid dyes. Specifically, the present disclosure relates to methods of using polypeptides to produce indigoid dye precursors from indole feed compounds, and the use of the indigoid dye precursors to produce indigoid dyes.
PROTECTING GROUP CHEMISTRY FOR CLEAN, REDUCTANT-FREE DYEING
申请人:The Regents of the University of California
公开号:US20180037917A1
公开(公告)日:2018-02-08
The present disclosure relates to the biosynthesis of indigoid dye precursors and their conversion to indigoid dyes. Specifically, the present disclosure relates to methods of using polypeptides to produce indigoid dye precursors from indole feed compounds, and the use of the indigoid dye precursors to produce indigoid dyes.
Exploiting Excited-State Aromaticity To Design Highly Stable Singlet Fission Materials
作者:Kealan J. Fallon、Peter Budden、Enrico Salvadori、Alex M. Ganose、Christopher N. Savory、Lissa Eyre、Simon Dowland、Qianxiang Ai、Stephen Goodlett、Chad Risko、David O. Scanlon、Christopher W. M. Kay、Akshay Rao、Richard H. Friend、Andrew J. Musser、Hugo Bronstein
DOI:10.1021/jacs.9b06346
日期:2019.9.4
Baird's rule of excited state aromaticity to manipulate the singlet-triplet energy gap and create novel singlet fission candidates. We achieve this through the inclusion of a [4n] 5-membered heterocycle, whose electronic resonance promotes aromaticity in the triplet state, stabilizing its energy relative to the singlet excited state. Using this theory, we design a family of derivatives of indolonaphthyridine
Selectively C-deuterated indigotins were synthesized from halogenated indigotins la-e as precursors. The described reactions - used already by the ancient purple dyers - allowed the introduction of D-atoms at defined positions of the indigo molecule. The exchange of halogen atoms by D-atoms was induced by UV irradiation of the leuco compounds 2a-c and 3a-c in D2O. The resulting leuco forms Ja-e were oxidized to the deuterated indigotins 5a-c. Some conclusions were drawn as to the kinetics of the reaction. The physical properties of the new compounds were determined.