Catalyst-controlled site-selective methylene C-H lactonization of dicarboxylic acids.
Catalyst-controlled site-selective methylene C-H lactonization of dicarboxylic acids.
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DOI:
10.1126/science.abq3048
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发表时间:
2022-06-24
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--
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Catalyst-controlled site-selective activation of β- and γ-methylene C─H bonds of free carboxylic acids is a long-standing challenge. Here we show that with a pair of palladium catalysts assembled with quinoline-pyridone ligands of different chelate ring sizes, it is possible to perform highly site-selective monolactonization reactions with a wide range of dicarboxylic acids, generating structurally diverse and synthetically useful γ- and δ-lactones via site-selective β- or γ-methylene C─H activation. The remaining carboxyl group serves as a versatile linchpin for further synthetic applications as demonstrated by the total synthesis of two natural products, myrotheciumone A and pedicellosine, from abundant dicarboxylic acids. A pair of palladium catalysts enable site-selective activation of β- and γ-methylene C─H bonds for the synthesis of γ- and δ-lactones from abundant dicarboxylic acids.
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影响因子:
56.9
作者:
Chen, Mark S.;White, M. Christina
通讯作者:
White, M. Christina
影响因子:
2.1
作者:
Bume, Desta Doro;Pitts, Cody Ross;Lectka, Thomas
通讯作者:
Lectka, Thomas
影响因子:
3.6
作者:
Khan, Shah Nawaz;Zaman, Muhammad Kashif;Sun, Zhankui
通讯作者:
Sun, Zhankui
影响因子:
2.7
作者:
Lin, Ting;Wang, Guanghui;Chen, Haifeng
通讯作者:
Chen, Haifeng
DOI:
10.1039/c39910001242
发表时间:
1991-09-15
影响因子:
--
作者:
KAO, LC;SEN, A
通讯作者:
SEN, A