2024
DOI: 10.1002/chem.202402886
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Direct Synthesis for Benzofuro[3,2‐d]pyrimidin‐2‐Amines via One‐Pot Cascade [4+2] Annulation/Aromatization between Benzofuran‐Derived Azadienes and Carbodiimide Anions

Chuan‐Chuan Wang,
Qing‐Long Wang,
Yi‐Hui Li
et al.

Abstract: The chemoselective [4+2] annulation/aromatization reactions between benzofuran‐derived azadienes and N−Ts cyanamides are developed, affording a convenient method for synthesizing benzofuro[3,2‐d]pyrimidin‐2‐amines under mild conditions. Herein, N−Ts cyanamides participated in reactions selectively via carbodiimide anion intermediates and the corresponding cyanamide anion intermediates derived products were not observed. The proposed chemoselective stepwise reaction mechanism was well supported by DFT calculati… Show more

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