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Photocatalytic direct borylation of carboxylic acids.

ABSTRACT: The preparation of high value-added boronic acids from cheap and plentiful carboxylic acids is desirable. To date, the decarboxylative borylation of carboxylic acids is generally realized through the extra step synthesized redox-active ester intermediate or in situ generated carboxylic acid covalent derivatives above 150 °C reaction temperature. Here, we report a direct decarboxylative borylation method of carboxylic acids enabled by visible-light catalysis and that does not require any extra stoichiometric additives or synthesis steps. This operationally simple process produces CO₂ and proceeds under mild reaction conditions, in terms of high step economy and good functional group compatibility. A guanidine-based biomimetic active decarboxylative mechanism is proposed and rationalized by mechanistic studies. The methodology reported herein should see broad application extending beyond borylation.

SUBMITTER: Wei Q

PROVIDER: S-EPMC9675845 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Photocatalytic direct borylation of carboxylic acids.

Wei Qiang Q Lee Yuhsuan Y Liang Weiqiu W Chen Xiaolei X Mu Bo-Shuai BS Cui Xi-Yang XY Wu Wangsuo W Bai Shuming S Liu Zhibo Z

Nature communications 20221119 1

The preparation of high value-added boronic acids from cheap and plentiful carboxylic acids is desirable. To date, the decarboxylative borylation of carboxylic acids is generally realized through the extra step synthesized redox-active ester intermediate or in situ generated carboxylic acid covalent derivatives above 150 °C reaction temperature. Here, we report a direct decarboxylative borylation method of carboxylic acids enabled by visible-light catalysis and that does not require any extra st ...[more]

PMID: 36402764

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