期刊
NEW JOURNAL OF CHEMISTRY
卷 46, 期 13, 页码 5927-5931出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj06205k
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资金
- National Natural Science Foundation of China [21771122, 22171173]
- Key Research and Development Program in Shaanxi Province of China [2021GY-308]
- Open Research Fund Program of CAS Key Laboratory of Energy Regulation Materials [ORFP2020-05]
Benzodiazepines are commonly found in biologically active compounds and pharmaceutical agents. Direct synthesis of these compounds from simple and easily accessible starting materials has been a challenge in synthetic chemistry. In this study, a highly efficient synthetic method for benzodiazepines was developed, involving a multi-step reaction sequence and specific catalysts, to achieve the synthesis under mild conditions.
Benzodiazepines are essential structural motifs commonly found in biologically active compounds and pharmaceutical agents. General and step-economical methods for the direct synthesis of benzodiazepines from simple and easily accessible starting materials remain a continuous challenge for synthetic chemists. Herein, a highly efficient synthetic method for benzodiazepine has been reported, which involves a ppm-level Pd-catalysed carbonylative coupling of iodobenzene with terminal alkynes to afford 1,3-ynones as key intermediates and a subsequent Cp2TiCl2/m-phthalic acid/ethanol-catalysed cyclo-condensation in one-pot conditions. The new approach proceeds with a broad substrate scope under mild reaction conditions, providing benzo[b][1,4]diazepines in up to 90% yield.
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