Journal
ORGANIC CHEMISTRY FRONTIERS
Volume 9, Issue 11, Pages 2963-2967Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2qo00201a
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Funding
- Natural Science Foundation of Shandong Province [ZR2020MB005]
- National Training Programs of Innovation and Entrepreneurship for Undergraduates [202110426062]
- Talent Fund for Province
- Ministry Co-construction Collaborative Innovation Center of Eco-Chemical Engineering [STHGYX2208]
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In this study, a direct synthesis method for thiocyanate derivatives was developed using a site-selective benzylic C-H thiocyanation reaction. The reaction exhibited a broad substrate scope and unique selectivity for the benzylic C-H site (2 degrees > 3 degrees > 1 degree) compared to existing methods. Preliminary mechanistic studies suggested a radical-polar crossover process. Additionally, this method was successfully applied for follow-up transformations and late-stage thiocyanation of bioactive molecules.
Direct benzylic C(sp(3))-H thiocyanation is explored as a straightforward strategy toward the synthesis of thiocyanate derivatives. We report herein an electrochemical protocol for site-selective benzylic C(sp(3))-H thiocyanation under mild reaction conditions. The reaction demonstrates broad substrate scope and unique benzylic C-H site selectivity (2 degrees > 3 degrees > 1 degrees) over the existing methods. Preliminary mechanistic studies indicate that the reaction probably undergoes a radical-polar crossover process. This method is also successfully used for follow-up transformation and late-stage thiocyanation of bioactive molecules.
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