Novel access to azaphosphiridine complexes and first applications using Brønsted acid-induced ring expansion reactions

2010 ◽  
Vol 39 (14) ◽  
pp. 3472 ◽  
Author(s):  
Stefan Fankel ◽  
Holger Helten ◽  
Gerd von Frantzius ◽  
Gregor Schnakenburg ◽  
Jörg Daniels ◽  
...  
Keyword(s):  
Ring Expansion ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Synthesis of Tryptamines through a Novel Brønsted Acid Mediated Tandem Reaction Initiated by α-Iminol Rearrangement of Transient 2-Substituted 2-Hydroxycyclobutylimines

Synthesis ◽  
2020 ◽  
Author(s):  
Angelo Frongia ◽  
Lorenzo Serusi ◽  
Federico Cuccu ◽  
Francesco Secci ◽  
David J. Aitken
Keyword(s):  
Condensation Reaction ◽  
Ring Expansion ◽  
Ring Closure ◽  
Tandem Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Rearrangement Process

AbstractA novel Brønsted acid promoted condensation reaction between a primary aniline and 2-hydroxycyclobutanone provides access to diverse tryptamine derivatives in moderate to good yields. The proposed mechanism involves an α-iminol rearrangement, ring expansion, ring closure, and a depart-and-return rearrangement process.

Brønsted acid mediated intramolecular cyclopropane ring expansion/[4 + 2]-cycloaddition

2019 ◽  
Vol 17 (47) ◽  
pp. 10004-10008 ◽  
Author(s):  
Jian Li ◽  
Shangrong Zhu ◽  
Qiuneng Xu ◽  
Li Liu ◽  
Shenghu Yan
Keyword(s):  
Ring Opening ◽  
Cyclopropane Ring ◽  
Ring Expansion ◽  
Cascade Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Cyclopropyl Ketone

A cascade reaction of 3-hydroxy-2-phenylisoindolin-1-one and cyclopropyl ketone has been developed via BrØnsted acid-promoted ring-opening/intramolecular cross-cycloaddition/[4 + 2]-cycloaddition process.

Reactions of 1,2-cyclopropyl carbohydrates

2014 ◽  
Vol 86 (9) ◽  
pp. 1377-1399 ◽  
Author(s):  
Joanne E. Harvey ◽  
Russell J. Hewitt ◽  
Peter W. Moore ◽  
Kalpani K. Somarathne
Keyword(s):  
Lewis Acid ◽  
Ring Expansion ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

AbstractAddition of a carbene to a glycal is the prominent method for the synthesis of 1,2-cyclopropyl carbohydrates. This incorporation of a cyclopropane into a carbohydrate scaffold enables divergent reactivity, with the two main classes being ring expansion and cleavage to 2-C-branched carbohydrates. A wide variety of products are obtained depending on the functionality attached to the cyclopropane (none or ester or halogens) and the promoter (Lewis acid, Brønsted acid, halophile or base) used in the reaction. This article reviews progress in the synthesis and reactions of 1,2-cyclopropyl carbohydrates since 2000 and discloses efforts by our group in the area.

First Brønsted Acid-Induced Ring Expansion of an Oxaphosphirane Complex: A Combined Experimental and DFT Study

2009 ◽  
Vol 28 (4) ◽  
pp. 1221-1226 ◽  
Author(s):  
Holger Helten ◽  
Janaina Marinas Pérez ◽  
Jörg Daniels ◽  
Rainer Streubel
Keyword(s):  
Ring Expansion ◽  
Dft Study ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Solvent-Free Acetalization of Glycerol with n-Octanal using Combined Brønsted Acid-Surfactant Catalyst

2017 ◽  
Vol 54 (1) ◽  
pp. 54-63 ◽  
Author(s):  
Xu Li ◽  
Lan Wu ◽  
Qiong Tang ◽  
Jinxiang Dong
Keyword(s):  
Solvent Free ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

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

scholarly journals Tailoring Lewis/Brønsted acid properties of MOF nodes via hydrothermal and solvothermal synthesis: simple approach with exceptional catalytic implications

2021 ◽  
Author(s):  
Sergio Rojas-Buzo ◽  
Benjamin Bohigues ◽  
Christian W. Lopes ◽  
Débora M. Meira ◽  
Mercedes Boronat ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Active Site ◽  
Solvothermal Synthesis ◽  
Simple Approach ◽  
Organic Reactions ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Acid Properties ◽  
Brönsted Acid

The Brønsted/Lewis acid properties of Hf-MOF-808 can be tuned by simply controlling the solvent employed in its synthesis, with direct catalytic implications on the activity and selectivity of organic reactions sensitive to the active site nature.

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
Sign in / Sign up

Export Citation Format

Share Document