11 article(s) from Yan, Chao-Guo
Graphical Abstract
Scheme 1: Representative cycloaddition reactions of phenacylmalononitriles.
Figure 1: Single crystal structure of compound 3k.
Figure 2: Single crystal structure of compound 4a.
Figure 3: Single crystal structure of compound 4c.
Scheme 2: Proposed reaction mechanism for compounds 3, 4, and 5.
Figure 4: Single crystal structure of compound 5.
Scheme 3: Control experiment.
Graphical Abstract
Scheme 1: Construction of diverse tetrahydrocarbazoles via Levy-type reaction.
Scheme 2: Synthesis of spiro[carbazole-3,3'-inolines]. Reaction conditions: 2-methylindole (0.5 mmol), aromat...
Scheme 3: Synthesis of spiro[carbazole-2,3'-indolines]. Reaction conditions: 2-methylindole (0.5 mmol), aroma...
Scheme 4: Synthesis of tetrahydrospiro[carbazole-3,5'-pyrimidines]. Reaction conditions: 2-methylindole (0.5 ...
Scheme 5: Synthesis of tetrahydrospiro[carbazole-3,1'-cycloalkane]-diones. Reaction conditions: 2-methylindol...
Scheme 6: Synthesis of 3,3'-(arylmethylene)bis(2-methyl-1H-indole). Reaction conditions: 2-methylindole (1.0 ...
Scheme 7: Proposed reaction mechanism for the multicomponent reaction.
Graphical Abstract
Figure 1: Single crystal structure of compound 3l.
Figure 2: Single crystal structure of compound 3s.
Figure 3: Single crystal structure of compound 3f’.
Figure 4: Single crystal structure of compound 5a.
Scheme 1: Proposed reaction mechanism for the compounds 3 and 5.
Figure 5: Single crystal struture of compound 8a.
Scheme 2: Proposed mechanism for the formation of dispiro compounds 8.
Graphical Abstract
Figure 1: Representative bioactive carbazole derivatives.
Scheme 1: Synthesis of tetrahydropyrrolo[3,4-c]carbazoles 3a and 3b.
Figure 2: Single crystal structure of the isomer 3a.
Figure 3: Single crystal structure of the isomer 3b.
Figure 4: Single crystal structure of the isomer 4g.
Scheme 2: Proposed domino reaction mechanism for the formation of carbazoles 6.
Graphical Abstract
Scheme 1: Synthesis of pillar[5]arene mono(oxyalkoxy)benzoic acids 3a–c.
Figure 1: single crystal structure of pillar[5]arene 2a.
Figure 2: Single crystal structure of pillar[5]arene 2f.
Scheme 2: Synthesis of diamido-bridged bis-pillar[5]arenes 5a–d.
Figure 3: The 2D NOSEY spectrum of bis-pillar[5]arene 5d.
Scheme 3: Synthesis of pillar[5]arene di(oxyalkoxy)benzoic acid 8.
Figure 4: Single crystal structure of pillar[5]arene 7.
Scheme 4: Synthesis of diamido-bridged tris-pillar[5]arenes 9a–d.
Figure 5: The 2D NOSEY spectra of tris-pillar[5]arene 9d.
Graphical Abstract
Figure 1: Molecular structure of spiro[indoline-3,4'-pyridine] 1k.
Scheme 1: The dynamic equilibrium of cis/trans-conformation of spiro[indoline-3,4'-pyridine].
Scheme 2: Proposed reaction mechanism for the four-component reaction.
Graphical Abstract
Figure 1: Molecular structure of compound 1f.
Figure 2: Molecular structure of compound 2a.
Figure 3: Molecular structure of compound 2h.
Scheme 1: The proposed reaction mechanism for the four-component reaction.
Graphical Abstract
Scheme 1: Synthesis of spiro-epoxyoxindole with pyridinium ylide.
Figure 1: Molecular structure of spiro compound 3c.
Figure 2: Molecular structure of spiro compound 4a.
Figure 3: Molecular structure of spiro compound 5o.
Graphical Abstract
Figure 1: Molecular structure of the spiro compound 1c.
Figure 2: Molecular structure of the spiro compound 1h.
Figure 3: Molecular structure of spiro compound 2b.
Figure 4: Molecular structure of spiro compound 3b.
Scheme 1: The proposed mechanism for the domino reaction.
Graphical Abstract
Scheme 1: The four-component reactions containing dimedone (a) and cyclopentane-1,3-dione (b).
Figure 1: Molecular structure of spiro[dihydropyridine-oxindole] 1b.
Figure 2: The two kinds of spiro compounds from reactions of isatins with arylamines and cyclic 1,3-diketones....
Figure 3: Molecular structure of spiro[dihydropyridine-oxindole] 2f.
Scheme 2: Condensation reactions of isatins with cyclopentane-1,3-dione.
Figure 4: Molecular structure of compound 3d.
Scheme 3: Proposed reaction mechanism for the three-component reaction.
Graphical Abstract
Scheme 1: Synthesis of polysubstituted tetrahydroquinolines 1a–1m.
Figure 1: Molecular structure of compound 1c.
Scheme 2: The proposed mechanism of domino Povarov reaction.