scholarly journals Enantioselective PCCP Brønsted acid-catalyzed aminalization of aldehydes

2021 ◽  
Vol 17 ◽  
pp. 2433-2440
Author(s):  
Martin Kamlar ◽  
Robert Reiberger ◽  
Martin Nigríni ◽  
Ivana Císařová ◽  
Jan Veselý
Keyword(s):  
Building Blocks ◽  
Cyclization Reaction ◽  
Bronsted Acids ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

Here we present an enantioselective aminalization of aldehydes catalyzed by Brønsted acids based on pentacarboxycyclopentadienes (PCCPs). The cyclization reaction using readily available anthranilamides as building blocks provides access to valuable 2,3-dihydroquinazolinones containing one stereogenic carbon center with good enantioselectivity (ee up to 80%) and excellent yields (up to 97%).

scholarly journals Enantioselective PCCP Brønsted acid-catalyzed aza-Piancatelli rearrangement

2019 ◽  
Vol 15 ◽  
pp. 1569-1574 ◽  
Author(s):  
Gabrielle R Hammersley ◽  
Meghan F Nichol ◽  
Helena C Steffens ◽  
Jose M Delgado ◽  
Gesine K Veits ◽  
...  
Keyword(s):  
Building Blocks ◽  
Starting Material ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Rapid Access ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Chiral Bronsted Acid

An enantioselective aza-Piancatelli rearrangement has been developed using a chiral Brønsted acid based on pentacarboxycyclopentadiene (PCCP). This reaction provides rapid access to valuable chiral 4-amino-2-cyclopentenone building blocks from readily available starting material and is operationally simple.

Asymmetric synthesis of isoquinolinonaphthyridines catalyzed by a chiral Brønsted acid

2017 ◽  
Vol 15 (31) ◽  
pp. 6474-6477 ◽  
Author(s):  
Jianjun Li ◽  
Yiwei Fu ◽  
Cong Qin ◽  
Yang Yu ◽  
Hao Li ◽  
...  
Keyword(s):  
Asymmetric Synthesis ◽  
Cyclization Reaction ◽  
Bronsted Acids ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Chiral Bronsted Acid ◽  
Chiral Brønsted Acids

A mild and efficient asymmetric cyclization reaction catalyzed by chiral Brønsted acids has been developed for the synthesis of chiral isoquinolinonaphthyridines.

Brønsted Acid Catalyzed Selective Cyclization Reaction: An Efficient and Facile Synthesis of Polysubstituted Imidazole and Pyrrole Derivatives

Synthesis ◽  
2016 ◽  
Vol 49 (03) ◽  
pp. 637-646 ◽  
Author(s):  
Liangce Rong ◽  
Lei Dai ◽  
Ping Shu ◽  
Zhansheng Wang ◽  
Qingyang Li ◽  
...  
Keyword(s):  
Cyclization Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Facile Synthesis ◽  
Pyrrole Derivatives ◽  
Brönsted Acid ◽  
Acid Catalyzed

Synthetic Scope of Brønsted Acid-Catalyzed Reactions of Carbonyl Compounds and Ethyl Diazoacetate

2021 ◽  
Author(s):  
Mizzanoor Rahaman ◽  
M. Shahnawaz Ali ◽  
Khorshada Jahan ◽  
Damon Hinz ◽  
Jawad Bin Belayet ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Ethyl Diazoacetate ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Catalyzed Reactions

Brønsted Acid-Catalyzed Friedel-Crafts-type Alkylation of Arenes with αAryl Diazoacetates

2021 ◽  
pp. 152751
Author(s):  
Wenming Chen ◽  
Guifang Chen ◽  
Biao Wang ◽  
Wei Wang ◽  
Wei Huang ◽  
...  
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

Brønsted Acid Catalyzed (4 + 2) Cyclocondensation of 3-Substituted Indoles with Donor–Acceptor Cyclopropanes

2021 ◽  
Author(s):  
Alesandere Ortega ◽  
Uxue Uria ◽  
Tomás Tejero ◽  
Liher Prieto ◽  
Efraim Reyes ◽  
...  
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Donor Acceptor ◽  
Acid Catalyzed
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