We report a visible-light induced
redox-neutral decarboxylative
cross coupling reaction of indole-3-acetic acid NHPI esters with indoles
using a Ru photosensitizer to deliver a wide range of symmetrical
and unsymmetrical 3,3′-bisindolylmethane derivatives. Furthermore,
the reaction is readily adapted to the preparation of a wide variety
of diarylmethane derivatives.
Allyl sulfides are important organosulfur compounds. K2S2O8 promoted dehydrative cross-coupling between α,α-diaryl allylic alcohols and thiophenols/thiols is demonstrated for the first time, which results in a wide range of allyl...
Sulfur dioxide (SO 2 ) is a gaseous signaling molecule and widely used as a preservative for foods, but its excessive intake is closely related to a series of diseases. Therefore, the development of a potent fluorescence probe for the detection of SO 2 in foods and biological systems is of great significance. Herein, we report for the first time a "dual-positive-ion" platform-based fluorescence probe CMQ, designed by a doubly activated but irreversible strategy, which results in its ultrafast response to SO 2 within 5 s in pure aqueous solution together with a low detection limit as 15.6 nM. In addition, the probe was successfully applied for imaging of SO 2 in mitochondria of living cells and zebrafish and prepared as a reagent kit for convenient and instantaneous quantification of HSO 3 − in real food samples.
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