Phosphoric Acid Catalyzed Formation of Hydrogen-Bonded o-Quinone Methides. Enantioselective Cycloaddition with β-Dicarbonyl Compounds toward Benzannulated Oxygen Heterocycles

2020 ◽  
Vol 85 (18) ◽  
pp. 11699-11720
Author(s):  
Fabian Göricke ◽  
Stefan Haseloff ◽  
Michael Laue ◽  
Maximilian Schneider ◽  
Thomas Brumme ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Quinone Methides ◽  
Dicarbonyl Compounds ◽  
Oxygen Heterocycles ◽  
Acid Catalyzed ◽  
Hydrogen Bonded

Asymmetric organocatalytic synthesis of chiral 3,3-disubstituted oxindolesviaa 1,6-conjugate addition reaction

2018 ◽  
Vol 16 (29) ◽  
pp. 5301-5309 ◽  
Author(s):  
Abdul Rahman ◽  
Qiaoxia Zhou ◽  
Xufeng Lin
Keyword(s):  
Phosphoric Acid ◽  
Addition Reaction ◽  
Conjugate Addition ◽  
Quinone Methides ◽  
Acid Catalyzed

The chiral spirocyclic phosphoric acid-catalyzed enantioselective 1,6-conjugate addition reaction ofpara-quinone methides derived fromN-unprotected isatins with indoles was developed.

Chiral phosphoric acid catalyzed asymmetric addition of naphthols to para-quinone methides

2016 ◽  
Vol 14 (24) ◽  
pp. 5751-5754 ◽  
Author(s):  
Yuk Fai Wong ◽  
Zhaobin Wang ◽  
Jianwei Sun
Keyword(s):  
Phosphoric Acid ◽  
Quinone Methides ◽  
Asymmetric Addition ◽  
Chiral Phosphoric Acid ◽  
Acid Catalyzed

An asymmetric addition of naphthols to in situ generated para-quinone methides catalyzed by a chiral phosphoric acid is described.

Chiral phosphoric acid catalyzed enantioselective annulation of acyclic enecarbamates to in situ-generated ortho-quinone methides

2017 ◽  
Vol 15 (35) ◽  
pp. 7272-7276 ◽  
Author(s):  
Chandan Gharui ◽  
Shreya Singh ◽  
Subhas Chandra Pan
Keyword(s):  
Phosphoric Acid ◽  
Cycloaddition Reaction ◽  
Quinone Methides ◽  
Chiral Phosphoric Acid ◽  
Acid Catalyzed ◽  
Phosphoric Acids

The first organocatalytic asymmetric [4 + 2]-cycloaddition reaction between acyclic enecarbamates with in situ generated ortho-quinone methides has been developed using chiral phosphoric acids as catalysts.

ChemInform Abstract: Phosphoric Acid Catalyzed Asymmetric 1,6-Conjugate Addition of Thioacetic Acid to para-Quinone Methides.

ChemInform ◽  
2016 ◽  
Vol 47 (22) ◽  
Author(s):  
Nan Dong ◽  
Zhi-Pei Zhang ◽  
Xiao-Song Xue ◽  
Xin Li ◽  
Jin-Pei Cheng
Keyword(s):  
Phosphoric Acid ◽  
Conjugate Addition ◽  
Thioacetic Acid ◽  
Quinone Methides ◽  
Acid Catalyzed

Phosphoric Acid Catalyzed Asymmetric 1,6-Conjugate Addition of Thioacetic Acid to para -Quinone Methides

2015 ◽  
Vol 55 (4) ◽  
pp. 1460-1464 ◽  
Author(s):  
Nan Dong ◽  
Zhi-Pei Zhang ◽  
Xiao-Song Xue ◽  
Xin Li ◽  
Jin-Pei Cheng
Keyword(s):  
Phosphoric Acid ◽  
Conjugate Addition ◽  
Thioacetic Acid ◽  
Quinone Methides ◽  
Acid Catalyzed
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