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Unveiling Hetero-Enyne Reactivity of Aryliminoboranes: Dearomative Hetero-Diels-Alder-Like Reactions.
Qiu, Shuang; Zhang, Xin; Hu, Chaopeng; Chu, Hongxu; Li, Qianli; Ruiz, David A; Liu, Liu Leo; Tung, Chen-Ho; Kong, Lingbing.
Affiliation
  • Qiu S; School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
  • Zhang X; Department of Chemistry, Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China.
  • Hu C; Department of Chemistry, Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China.
  • Chu H; School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
  • Li Q; School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China.
  • Ruiz DA; Department of Chemistry, Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China.
  • Liu LL; Department of Chemistry, Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China.
  • Tung CH; School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
  • Kong L; School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
Angew Chem Int Ed Engl ; 61(34): e202205814, 2022 Aug 22.
Article in En | MEDLINE | ID: mdl-35713957
ABSTRACT
Being isoelectronic with alkynes, iminoboranes with a polar B≡N triple bond have been exclusively investigated as a potent 1,2-dipole in synthetic chemistry. Herein, we disclose the unprecedented reactivity of aryliminoboranes via the BNCC π conjugation, namely hetero-enyne behavior. This allows for facile dearomative Diels-Alder-like reactions of aryliminoboranes with aldehydes. This cycloaddition features mild conditions, is catalyst-free, and has a broad substrate scope and good functional group tolerance. Kinetic and computational studies reveal its second-order reaction and concerted cyclization mechanism. This report unveils new synthetic application of iminoboranes beyond their classical reaction patterns.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Angew Chem Int Ed Engl Year: 2022 Document type: Article Affiliation country: China

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Angew Chem Int Ed Engl Year: 2022 Document type: Article Affiliation country: China