ChemInform Abstract: Broensted Acid Catalyzed, Conjugate Addition of β-Dicarbonyls to in situ Generated ortho-Quinone Methides-Enantioselective Synthesis of 4-Aryl-4H-chromenes.

ChemInform ◽  
2015 ◽  
Vol 46 (4) ◽  
pp. no-no
Author(s):  
Osama El-Sepelgy ◽  
Stefan Haseloff ◽  
Santosh Kumar Alamsetti ◽  
Christoph Schneider
Keyword(s):  
Conjugate Addition ◽  
Enantioselective Synthesis ◽  
Quinone Methides ◽  
Acid Catalyzed

scholarly journals Chiral Brønsted acid-catalyzed Friedel–Crafts alkylation of electron-rich arenes with in situ-generated ortho-quinone methides: highly enantioselective synthesis of diarylindolylmethanes and triarylmethanes

2015 ◽  
Vol 51 (8) ◽  
pp. 1461-1464 ◽  
Author(s):  
Satyajit Saha ◽  
Santosh Kumar Alamsetti ◽  
Christoph Schneider
Keyword(s):  
Enantioselective Synthesis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Quinone Methides ◽  
Reaction Conditions ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Chiral Bronsted Acid ◽  
Hydrogen Bonded

Hydrogen-bonded, in situ-generated ortho-quinone methides undergo highly enantioselective Friedel–Crafts reactions with indoles and naphthols under mild reaction conditions.

Organocatalytic site- and stereoselective 1,6-additions of N-aryl-3-oxobutanamides to propargylic aza-p-quinone methides

2020 ◽  
Vol 7 (21) ◽  
pp. 3446-3451
Author(s):  
Fushuai Li ◽  
Xuling Chen ◽  
Shuai Liang ◽  
Zhenyan Shi ◽  
Pengfei Li ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Conjugate Addition ◽  
Quinone Methides ◽  
Propargylic Alcohols ◽  
Chiral Phosphoric Acid ◽  
Acid Catalyzed ◽  
Site Selective ◽  
First Time

A chiral phosphoric acid catalyzed site-selective 1,6-conjugate addition of N-aryl-3-oxobutanamides to in situ formed propargylic aza-p-quinone methides from propargylic alcohols has been established for the first time.

Lewis acid-catalyzed tandem cyclization of in situ generated o-quinone methides and arylsulfonyl hydrazides for a one-pot entry to 3-sulfonylbenzofurans

2019 ◽  
Vol 6 (24) ◽  
pp. 3929-3933 ◽  
Author(s):  
Fan-Xiao Meng ◽  
Ruo-Nan Wang ◽  
Hong-Li Huang ◽  
Shu-Wen Gong ◽  
Qian-Li Li ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Quinone Methides ◽  
One Pot ◽  
Acid Catalyzed ◽  
Tandem Cyclization ◽  
First Time

Lewis acid-mediated one-pot tandem cyclization of o-QMs with arylsulfonyl hydrazides was described for the first time and the corresponding 3-sulfonylbenzofuran products were obtained in moderate to good yields.

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