One-step continuous flow synthesis of highly substituted pyrrole-3-carboxylic acid derivatives via in situ hydrolysis of tert-butyl esters.

One-step continuous flow synthesis of highly substituted pyrrole-3-carboxylic acid derivatives via in situ hydrolysis of tert-butyl esters.
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DOI:
10.1021/ol102216x
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发表时间:
2010-11-19
期刊:
影响因子:
5.2
通讯作者:
Cosford, Nicholas D. P.
Cosford, Nicholas D. P.
中科院分区:
化学1区
文献类型:
--
作者:
Herath, Ananda;Cosford, Nicholas D. P.

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The first one-step, continuous flow synthesis of pyrrole-3-carboxylic acids directly from tert-butyl acetoacetates, amines and 2-bromoketones is reported. The HBr generated as a by-product in the Hantzsch reaction was utilized in the flow method to saponify the t-butyl esters in situ to provide the corresponding acids in a single microreactor. The protocol was used in the multistep synthesis of pyrrole-3-carboxamides, including two CB1 inverse agonists, directly from commercially available starting materials in a single continuous process.
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