1-(3,4-Dihydro-4-oxoquinazolin-3-yl)aziridines (Q-substituted aziridines): ring-opening reactions with C–N bond cleavage and preparation of Q-free chirons

2000 ◽  
pp. 3096-3106 ◽  
Author(s):  
Robert S. Atkinson ◽  
Andrew P. Ayscough ◽  
William T. Gattrell ◽  
Tony M. Raynham
Keyword(s):  
Ring Opening ◽  
Bond Cleavage ◽  
Ring Opening Reactions

Au-catalyzed ring-opening reactions of 2-(1-alkynyl-cyclopropyl)pyridines with nucleophiles

2015 ◽  
Vol 13 (17) ◽  
pp. 4855-4858 ◽  
Author(s):  
Ren-Rong Liu ◽  
Shi-Chun Ye ◽  
Chuan-Jun Lu ◽  
Bin Xiang ◽  
Jianrong Gao ◽  
...  
Keyword(s):  
Ring Opening ◽  
Bond Cleavage ◽  
Mild Conditions ◽  
Efficient Access ◽  
Ring Opening Reactions ◽  
Novel Method

A novel method for the C–C bond cleavage of cyclopropanes was developed by gold-catalyzed cycloisomerization of 2-(1-alkynyl-cyclopropyl)pyridine with nucleophiles, which provides efficient access to structurally diverse indolizines under mild conditions.

Synthesis ofC-Unsubstituted 1,2-Diazetidines and Their Ring-Opening Reactions via Selective N–N Bond Cleavage

2018 ◽  
Vol 83 (16) ◽  
pp. 9497-9503 ◽  
Author(s):  
Hetti Handi Chaminda Lakmal ◽  
Joanna Xiuzhu Xu ◽  
Xue Xu ◽  
Bassem Ahmed ◽  
Christopher Fong ◽  
...  
Keyword(s):  
Ring Opening ◽  
Bond Cleavage ◽  
Ring Opening Reactions

scholarly journals Catalytic Ring Opening of α-Epoxyketones Using DDQ in Methanol Solution at Room Temperature and under Reflux Conditions in Excellent Yields

2007 ◽  
Vol 62 (8) ◽  
pp. 1030-1034 ◽  
Author(s):  
Hamid R. Memarian ◽  
Ali Saffar-Teluri ◽  
Mohsen Khosravi-Babadi
Keyword(s):  
Electron Acceptor ◽  
Ring Opening ◽  
Room Temperature ◽  
Bond Cleavage ◽  
Methanol Solution ◽  
Effect Of Temperature ◽  
Cyclic Voltammetric ◽  
Ring Opening Reactions ◽  
Voltammetric Studies ◽  
Cyclic Voltammetric Studies

Catalytic ring opening reactions of α-epoxyketones by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) in methanol solution at r. t. and under reflux conditions resulted in the formation of α-hydroxy-β -methoxyketones through Cβ -O bond cleavage in excellent yields.Whereas the type and nature of the additional substituent affects the rate of ring opening, the effect of temperature has an extreme influence on the rate of reactions. Cyclic voltammetric studies of DDQ at 15 °C and 33 °C support the increased electron-acceptor ability of DDQ by the increasing of temperature.

ChemInform Abstract: Ring-Opening Reactions of Difluoro(methylene)cyclopropanes with Halogens and Amines.

ChemInform ◽  
2009 ◽  
Vol 40 (12) ◽  
Author(s):  
Xiao-Chun Hang ◽  
Qing-Yun Chen ◽  
Ji-Chang Xiao
Keyword(s):  
Ring Opening ◽  
Ring Opening Reactions

Substituent Effects in Mechanochemical Allowed and Forbidden Cyclobutene Ring-Opening Reactions

2021 ◽  
Author(s):  
Cameron L. Brown ◽  
Brandon H. Bowser ◽  
Jan Meisner ◽  
Tatiana B. Kouznetsova ◽  
Stefan Seritan ◽  
...  
Keyword(s):  
Ring Opening ◽  
Substituent Effects ◽  
Ring Opening Reactions

ChemInform Abstract: Discovery of μ-Opioid Selective Ligands Derived from 1-Aminotetralin Scaffolds Made via Metal-Catalyzed Ring-Opening Reactions.

ChemInform ◽  
2009 ◽  
Vol 40 (29) ◽  
Author(s):  
Chris Dockendorff ◽  
Shujuan Jin ◽  
Madeline Olsen ◽  
Mark Lautens ◽  
Martin Coupal ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Reactions ◽  
Selective Ligands ◽  
Metal Catalyzed

scholarly journals Stereoselective Synthesis of Tetraalkyl Cyclobutene-1,2,3,4-tetracarboxylates. Synthesis of Tetraalkyl (Z,Z)-Buta-1,3-diene-1,2,3,4-tetracarboxylates

1999 ◽  
Vol 23 (8) ◽  
pp. 512-513
Author(s):  
Issa Yavari ◽  
Farahnaz Nourmohammadian
Keyword(s):  
Ring Opening ◽  
Wittig Reaction ◽  
Stereoselective Synthesis ◽  
Intramolecular Wittig Reaction ◽  
Ring Opening Reactions ◽  
Boiling Toluene

Tetraalkyl cyclobutene-1,2,3,4-tetracarboxylates, prepared by intramolecular Wittig reaction between a vinylphosphonium salt and diethyl 2-oxobutanedioate, undergo electrocyclic ring-opening reactions, in boiling toluene, to produce highly electron-deficient 1,3-dienes.

Thiophene ring-opening reactions. Direct access to the synthesis of 1,3,4-thiadiazoline-(condenced) pyridone hybrids

Tetrahedron ◽  
2021 ◽  
pp. 131957
Author(s):  
Mohammed M. Abadleh ◽  
Ahmad H. Abdullah ◽  
Firas F. Awwadi ◽  
Mustafa M. El-Abadelah
Keyword(s):  
Ring Opening ◽  
Thiophene Ring ◽  
Direct Access ◽  
Ring Opening Reactions
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