Abstract
A copper catalyzed tandem CuAAC/ring cleavage/[4+2] annulation reaction of terminal ynones, sulfonyl azides, and imines has been developed to synthesize the functionalized oxazines under mild conditions. Particularly, the intermediate N-sulfonyl acylketenimines undergo cycloaddition of an inverse electron demand Diels–Alder reaction with imines and a series of 1,3-oxazine derivatives were obtained successfully in good yields.
Subject
Physical and Theoretical Chemistry,Catalysis
Cited by
3 articles.
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1. Synthesis of 2‐Aminopyridine Derivatives via a Tandem CuAAC/Ring‐Cleavage/[4+2]‐Cycloaddition/Rearrangement Reaction Sequence;Advanced Synthesis & Catalysis;2024-08-07
2. Transformation of 5-acylated N-fluoroalkyl-1,2,3-triazoles to trifluoromethylated ring-fused isoquinolines, 1,3-oxazines, and 1,3-oxazin-6-ones via ketenimines;RSC Advances;2024
3. Synthesis of (Z)-N,3-dicyclohexyl-6-substituted-4-(trichloromethyl)-3,4-dihydro-2H-1,3,5-oxadiazin-2-imines via [4 + 2] hetero Diels-Alder reaction: Their spectral characteristics and molecular structure;Chemical Data Collections;2023-12