Efficient Nitrogen Ring-Expansion Process Facilitated by in Situ Hemiketal Formation. An Asymmetric Schmidt Reaction

1995 ◽  
Vol 117 (30) ◽  
pp. 8047-8048 ◽  
Author(s):  
Vijaya Gracias ◽  
Gregory L. Milligan ◽  
Jeffrey Aube
Keyword(s):  
Ring Expansion ◽  
Expansion Process ◽  
Schmidt Reaction ◽  
Nitrogen Ring

Ring expansion and ring opening of 3-halooxindoles with N-alkoxycarbonyl-O-tosylhydroxylamines for divergent access to 4-aminoquinolin-2-ones and N-Cbz-N’-arylureas

2021 ◽  
Author(s):  
Wei-Cheng Yuan ◽  
Jian Zuo ◽  
Shu-Pei Yuan ◽  
Jian-Qiang Zhao ◽  
Zhen-Hua Wang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Expansion

The reaction of N-alkoxycarbonyl-O-tosylhydroxylamines with indol-2-ones in situ generated from 3-halooxindoles has been developed for divergently accessing 4-aminoquinolin-2-ones and N-Cbz-N’-arylureas in good to excellent yields.

ChemInform Abstract: In situ Generation and Intramolecular Schmidt Reaction of Keto Azides in a Microwave-Assisted Flow Format.

ChemInform ◽  
2011 ◽  
Vol 43 (1) ◽  
pp. no-no
Author(s):  
Thomas O. Painter ◽  
Paul D. Thornton ◽  
Mario Orestano ◽  
Conrad Santini ◽  
Michael G. Organ ◽  
...  
Keyword(s):  
Schmidt Reaction ◽  
Microwave Assisted ◽  
In Situ Generation

ChemInform Abstract: New Route to Pyrido[1,2-b]pyridazinium Inner Salts. Evidence of a 1,3-Dipolar Cycloaddition-Ring Expansion Process.

ChemInform ◽  
2010 ◽  
Vol 30 (17) ◽  
pp. no-no
Author(s):  
Jesus Valenciano ◽  
Ana M. Cuadro ◽  
Juan J. Vaquero ◽  
Julio Alvarez-Builla
Keyword(s):  
Ring Expansion ◽  
Dipolar Cycloaddition ◽  
Expansion Process

ChemInform Abstract: Ring Expansion by in situ Tethering of Hydroxy Azides to Ketones: The Boyer Reaction.

ChemInform ◽  
2010 ◽  
Vol 29 (11) ◽  
pp. no-no
Author(s):  
V. GRACIAS ◽  
K. E. FRANK ◽  
G. L. MILLIGAN ◽  
J. AUBE
Keyword(s):  
Ring Expansion ◽  
Hydroxy Azides

scholarly journals In Situ Generation and Intramolecular Schmidt Reaction of Keto Azides in a Microwave-Assisted Flow Format

2011 ◽  
Vol 17 (35) ◽  
pp. 9595-9598 ◽  
Author(s):  
Thomas O. Painter ◽  
Paul D. Thornton ◽  
Mario Orestano ◽  
Conrad Santini ◽  
Michael G. Organ ◽  
...  
Keyword(s):  
Schmidt Reaction ◽  
Microwave Assisted ◽  
In Situ Generation

Development and Validation of Numerical Model for Predicting Electromagnetic Expansion of Composite Rings

2013 ◽  
Vol 198 ◽  
pp. 627-632
Author(s):  
Jacek Janiszewski ◽  
Robert Panowicz
Keyword(s):  
Numerical Model ◽  
Ring Expansion ◽  
Constitutive Relationship ◽  
Numerical Code ◽  
Expansion Process ◽  
Ring Specimen ◽  
Good Convergence ◽  
Composite Ring ◽  
High Strain Rate Deformation ◽  
Development And Validation

In the present work, the description of a numerical model for predicting the electromagnetic composite ring expansion process and validation of a developed numerical code is presented. The strength response of rings materials under high strain rate deformation was described by using the well-known JohnsonCook constitutive relationship. Numerical considerations and experimental validation were performed for a composite ring consisted of a copper drive ring and X37CrMoV51 steel ring specimen. The analyses of the obtained results allow to find out that good convergence of theoretical and experimental data was achieved.

scholarly journals Surprising Outcomes of Classic Ring-Expansion Conditions Applied to Octaethyloxochlorin, 3. Schmidt-Reaction Conditions

2017 ◽  
Vol 2017 (14) ◽  
pp. 1835-1842 ◽  
Author(s):  
Ruoshi Li ◽  
Mathias Zeller ◽  
Torsten Bruhn ◽  
Christian Brückner
Keyword(s):  
Ring Expansion ◽  
Reaction Conditions ◽  
Schmidt Reaction
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