Ring Transformation of Cyclopropenes to Benzo‐Fused Five‐Membered Oxa‐ and Aza‐Heterocycles via a Formal [4+1] Cyclization

In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have emerged. Exploiting the distinctive properties of cyclopropenes, this study introduces an innovative approach for the synthesis of benzo‐fused five‐membered...

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Published inAdvanced science Vol. 11; no. 40; pp. e2407931 - n/a
Main Authors Gu, Fengyan, Lin, Binyan, Peng, Zhi‐Huan, Liu, Shijie, Wu, Yuanqing, Luo, Mei, Ding, Ning, Zhan, Qichen, Cao, Peng, Zhou, Zhi, Cao, Tao
Format Journal Article
LanguageEnglish
Published Germany John Wiley & Sons, Inc 01.10.2024
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Abstract In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have emerged. Exploiting the distinctive properties of cyclopropenes, this study introduces an innovative approach for the synthesis of benzo‐fused five‐membered oxa‐ and aza‐heterocycles through a formal [4+1] cyclization and subsequent acid‐catalyzed intramolecular O‐ to N‐ rearrangement. These transformations exhibit mild reaction conditions and a wide substrate scope. The applications in the late‐stage modification of complex molecules and in the synthesis of a potential PD‐L1 gene down‐regulator, make this method highly appealing in related fields. Combined experimental mechanistic studies and DFT calculations demonstrate Rh(III)‐mediated sequential C─H coupling/π‐allylation/dynamically favorable O‐attack route. Taking advantage of the unique ring‐opening properties of cyclopropenes, a versatile and efficient approach toward benzo‐fused five‐membered oxa‐ and aza‐heterocycles from the same raw materials is reported. With this practical method, a potential PD‐L1 down‐regulator with a novel isobenzofuranone O‐alkyl oxime moiety is synthesized.
AbstractList In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have emerged. Exploiting the distinctive properties of cyclopropenes, this study introduces an innovative approach for the synthesis of benzo‐fused five‐membered oxa‐ and aza‐heterocycles through a formal [4+1] cyclization and subsequent acid‐catalyzed intramolecular O‐ to N‐ rearrangement. These transformations exhibit mild reaction conditions and a wide substrate scope. The applications in the late‐stage modification of complex molecules and in the synthesis of a potential PD‐L1 gene down‐regulator, make this method highly appealing in related fields. Combined experimental mechanistic studies and DFT calculations demonstrate Rh(III)‐mediated sequential C─H coupling/π‐allylation/dynamically favorable O‐attack route.
In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have emerged. Exploiting the distinctive properties of cyclopropenes, this study introduces an innovative approach for the synthesis of benzo‐fused five‐membered oxa‐ and aza‐heterocycles through a formal [4+1] cyclization and subsequent acid‐catalyzed intramolecular O‐ to N‐ rearrangement. These transformations exhibit mild reaction conditions and a wide substrate scope. The applications in the late‐stage modification of complex molecules and in the synthesis of a potential PD‐L1 gene down‐regulator, make this method highly appealing in related fields. Combined experimental mechanistic studies and DFT calculations demonstrate Rh(III)‐mediated sequential C─H coupling/π‐allylation/dynamically favorable O‐attack route. Taking advantage of the unique ring‐opening properties of cyclopropenes, a versatile and efficient approach toward benzo‐fused five‐membered oxa‐ and aza‐heterocycles from the same raw materials is reported. With this practical method, a potential PD‐L1 down‐regulator with a novel isobenzofuranone O‐alkyl oxime moiety is synthesized.
In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have emerged. Exploiting the distinctive properties of cyclopropenes, this study introduces an innovative approach for the synthesis of benzo‐fused five‐membered oxa‐ and aza‐heterocycles through a formal [4+1] cyclization and subsequent acid‐catalyzed intramolecular O ‐ to N ‐ rearrangement. These transformations exhibit mild reaction conditions and a wide substrate scope. The applications in the late‐stage modification of complex molecules and in the synthesis of a potential PD‐L1 gene down‐regulator, make this method highly appealing in related fields. Combined experimental mechanistic studies and DFT calculations demonstrate Rh(III)‐mediated sequential C─H coupling/π‐allylation/dynamically favorable O ‐attack route. Taking advantage of the unique ring‐opening properties of cyclopropenes, a versatile and efficient approach toward benzo‐fused five‐membered oxa‐ and aza‐heterocycles from the same raw materials is reported. With this practical method, a potential PD‐L1 down‐regulator with a novel isobenzofuranone O ‐alkyl oxime moiety is synthesized.
Abstract In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have emerged. Exploiting the distinctive properties of cyclopropenes, this study introduces an innovative approach for the synthesis of benzo‐fused five‐membered oxa‐ and aza‐heterocycles through a formal [4+1] cyclization and subsequent acid‐catalyzed intramolecular O ‐ to N ‐ rearrangement. These transformations exhibit mild reaction conditions and a wide substrate scope. The applications in the late‐stage modification of complex molecules and in the synthesis of a potential PD‐L1 gene down‐regulator, make this method highly appealing in related fields. Combined experimental mechanistic studies and DFT calculations demonstrate Rh(III)‐mediated sequential C─H coupling/π‐allylation/dynamically favorable O ‐attack route.
Author Wu, Yuanqing
Ding, Ning
Lin, Binyan
Zhan, Qichen
Peng, Zhi‐Huan
Zhou, Zhi
Liu, Shijie
Cao, Tao
Gu, Fengyan
Luo, Mei
Cao, Peng
AuthorAffiliation 2 State Key Laboratory on Technologies for Chinese Medicine Pharmaceutical Process Control and Intelligent Manufacture Nanjing University of Chinese Medicine Nanjing Jiangsu 210023 China
5 The Quzhou Affiliated Hospital of Wenzhou Medical University Quzhou People's Hospital Quzhou Zhejiang 324000 China
6 Gaoyou Hospital of Traditional Chinese Medicine Yangzhou Jiangsu 225600 China
4 Jiangsu Provincial Medicinal Innovation Center Affiliated Hospital of Integrated Traditional Chinese and Western Medicine Nanjing University of Chinese Medicine Nanjing Jiangsu 210028 China
1 School of Pharmacy Nanjing University of Chinese Medicine Nanjing Jiangsu 210023 China
3 Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 China
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– name: 5 The Quzhou Affiliated Hospital of Wenzhou Medical University Quzhou People's Hospital Quzhou Zhejiang 324000 China
– name: 6 Gaoyou Hospital of Traditional Chinese Medicine Yangzhou Jiangsu 225600 China
– name: 1 School of Pharmacy Nanjing University of Chinese Medicine Nanjing Jiangsu 210023 China
– name: 2 State Key Laboratory on Technologies for Chinese Medicine Pharmaceutical Process Control and Intelligent Manufacture Nanjing University of Chinese Medicine Nanjing Jiangsu 210023 China
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Issue 40
Keywords late‐stage modifications
cyclopropenes
ring transformation
heterocycles
DFT calculations
rhodium
Language English
License Attribution
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This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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Snippet In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have emerged....
Abstract In the context of the growing importance of heterocyclic compounds across various disciplines, numerous strategies for their construction have...
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StartPage e2407931
SubjectTerms Carbon
cyclopropenes
DFT calculations
heterocycles
late‐stage modifications
Ligands
Nitrogen
rhodium
ring transformation
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Title Ring Transformation of Cyclopropenes to Benzo‐Fused Five‐Membered Oxa‐ and Aza‐Heterocycles via a Formal [4+1] Cyclization
URI https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fadvs.202407931
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https://pubmed.ncbi.nlm.nih.gov/PMC11516165
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