A New Approach to the Nazarov Reaction via Sequential Electrocyclic Ring Opening and Ring Closure

2006 ◽  
Vol 128 (29) ◽  
pp. 9348-9349 ◽  
Author(s):  
Tina N. Grant ◽  
F. G. West
Keyword(s):  
Ring Opening ◽  
Ring Closure ◽  
Nazarov Reaction ◽  
New Approach

scholarly journals A New Approach to the Nazarov Reaction via Sequential Electrocyclic Ring Opening and Ring Closure.

ChemInform ◽  
2006 ◽  
Vol 37 (48) ◽  
Author(s):  
Tina N. Grant ◽  
F. G. West
Keyword(s):  
Ring Opening ◽  
Ring Closure ◽  
Nazarov Reaction ◽  
New Approach

Furan Ring Opening—Isochromene Ring Closure: A New Approach to Isochromene Ring Synthesis.

ChemInform ◽  
2006 ◽  
Vol 37 (11) ◽  
Author(s):  
Alexander V. Butin ◽  
Valdimir T. Abaev ◽  
Vladimir V. Mel'chin ◽  
Artem S. Dmitriev
Keyword(s):  
Ring Opening ◽  
Furan Ring ◽  
Ring Closure ◽  
New Approach ◽  
Ring Synthesis

Furan ring opening–isochromene ring closure: a new approach to isochromene ring synthesis

2005 ◽  
Vol 46 (48) ◽  
pp. 8439-8441 ◽  
Author(s):  
Alexander V. Butin ◽  
Vladimir T. Abaev ◽  
Vladimir V. Mel’chin ◽  
Artem S. Dmitriev
Keyword(s):  
Ring Opening ◽  
Furan Ring ◽  
Ring Closure ◽  
New Approach ◽  
Ring Synthesis

Lewis Acid Mediated Reductive Ring Opening of 2-Methoxyethylidene Acetals: A New Approach to 2-Methoxyethyl (MOE) Ethers ofcis-Diols

Synlett ◽  
2005 ◽  
pp. 2437-2440 ◽  
Author(s):  
Stephen Hanessian ◽  
Roger Machaalani
Keyword(s):  
Lewis Acid ◽  
Ring Opening ◽  
New Approach

First Total Synthesis of a Fluorinated Calystegin

2010 ◽  
Vol 65 (4) ◽  
pp. 445-451 ◽  
Author(s):  
René Csuk ◽  
Erik Prell ◽  
Stefan Reißmann ◽  
Claudia Korb
Keyword(s):  
Total Synthesis ◽  
Ring Opening ◽  
Competitive Inhibitor ◽  
Ring Closure ◽  
Target Compound ◽  
Metathesis Reaction ◽  
Grubbs Catalyst ◽  
Ring Opening Reaction ◽  
Ultrasound Assisted ◽  
Key Steps

A straightforward chiral pool synthesis for the first fluorinated calystegin is described. Key steps of this synthesis include an ultrasound-assisted Zn-mediated tandem ring opening reaction followed by a Grubbs’ catalyst-mediated ring closure metathesis reaction. The target compound is a selective and competitive inhibitor for a β -glycosidase.

ChemInform Abstract: Synthesis of Functionalized Cyclophanes by Ring-Opening/Ring-Closure Cascade Reactions of Siloxycyclopropanes.

ChemInform ◽  
2010 ◽  
Vol 30 (21) ◽  
pp. no-no
Author(s):  
Astrid Ullmann ◽  
Margit Gruner ◽  
Hans-Ulrich Reissig
Keyword(s):  
Ring Opening ◽  
Cascade Reactions ◽  
Ring Closure

ChemInform Abstract: Ring Opening Ring Closure Reactions with 3-Substituted Chromones under Nucleophilic Conditions

ChemInform ◽  
2015 ◽  
Vol 46 (50) ◽  
pp. no-no
Author(s):  
Magdy A. Ibrahim ◽  
Nasser M. El-Gohary ◽  
Sara Said
Keyword(s):  
Ring Opening ◽  
Ring Closure

An unexpected thermal-ring-rearrangement of benzochromenes to inden-3-yl-naphthols with pTsOH

2018 ◽  
Vol 16 (42) ◽  
pp. 7920-7925 ◽  
Author(s):  
Srinivasarao Yaragorla ◽  
Tabassum Khan
Keyword(s):  
Ring Opening ◽  
Ring Closure ◽  
Acid Catalysts ◽  
First Report

Described here is the first report of an unexpected thermal-ring rearrangement (TRR) of benzochromenes to indene derivatives promoted by pTsOH, which proceeds through the protonation of benzochromenes by an acid catalysts followed by ring-opening and ring-closure by an intramolecular Friedel–Crafts cyclization.

scholarly journals One-Pot Synthesis of Novel Dibenzoxanthenes, Diarylbutanes, and Calix[4]resorcinarenes via Consecutive Pyrrolidine Ring-Closure/Ring-Opening Reactions

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Andrey V. Smolobochkin ◽  
Almir S. Gazizov ◽  
Alexander R. Burilov ◽  
Michail A. Pudovik
Keyword(s):  
Ring Opening ◽  
Ring Closure ◽  
Acidic Media ◽  
Pyrrolidine Ring ◽  
One Pot ◽  
One Pot Synthesis ◽  
Ring Opening Reactions

Herein, we report the approach to the otherwise hardly accessible dibenzoxanthenes, diarylbutanes, and calix[4]resorcinarenes possessing urea moieties based on the reaction of N-(4,4-diethoxybutyl)ureas with electron-rich aromatics in strongly acidic media. Unlike the previously developed methods, the proposed approach benefits from one-pot procedure and allows to obtain the target compounds with much higher yields.

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