Non-Cp titanium alkoxide-based homolytic ring-opening of epoxides by an intramolecular hydrogen abstraction in β-titanoxy radical intermediates

2011 ◽  
Vol 47 (27) ◽  
pp. 7857 ◽  
Author(s):  
Tsuyoshi Kawaji ◽  
Noriaki Shohji ◽  
Kenji Miyashita ◽  
Sentaro Okamoto
Keyword(s):  
Ring Opening ◽  
Hydrogen Abstraction ◽  
Titanium Alkoxide ◽  
Radical Intermediates ◽  
Ring Opening Of Epoxides ◽  
Intramolecular Hydrogen

The photoreactions of 2-isopropoxy-1,4-naphthoquinone in the presence of cobalt acetylacetonate and other organometallics: an esr and CIDEP study

1985 ◽  
Vol 63 (8) ◽  
pp. 2281-2284 ◽  
Author(s):  
M. Catherine Depew ◽  
B. B. Adeleke ◽  
Allison Rutter ◽  
J. K. S. Wan
Keyword(s):  
Quantum Efficiency ◽  
Hydrogen Abstraction ◽  
Organometallic Compounds ◽  
High Quantum Efficiency ◽  
Radical Intermediates ◽  
High Quantum ◽  
Ether Oxygen ◽  
Cobalt Acetylacetonate ◽  
Intramolecular Hydrogen ◽  
Very High

2-Isopropoxy-1,4-naphthoquinone has been used as a photoredox reagent in non-silver imaging process. The present study showed that the photoreactions of this quinone are very sensitive to solvent due to the competing intramolecular hydrogen abstraction from the isopropoxy group. The presence of cobalt acetylacetonate often modifies the reactions which leads to a very high quantum efficiency of producing the radical intermediates. The ether oxygen in the 2-substituent provides a further coordinating site for organometallic compounds and the quinone behaves as a 1,2-quinone when interacting with metals.

Visible Light-Promoted Catalytic Ring-Opening Isomerization of 1,2-Disubstituted Cyclopropanols to Linear Ketones

2019 ◽  
Author(s):  
Marharyta V. Laktsevich-Iskryk ◽  
Nastassia A. Varabyeva ◽  
Volha V. Kazlova ◽  
Vladimir N. Zhabinskii ◽  
Vladimir A. Khripach ◽  
...  
Keyword(s):  
Visible Light ◽  
Functional Groups ◽  
Ring Opening ◽  
Radical Intermediates ◽  
Reaction Proceeds

In this article, we report a photocatalytic protocol for the isomerization of 1,2-disubstituted cyclopropanols to linear ketones. The reaction proceeds <i>via</i> radical intermediates and tolerates various functional groups.

Visible Light-Promoted Catalytic Ring-Opening Isomerization of 1,2-Disubstituted Cyclopropanols to Linear Ketones

2019 ◽  
Author(s):  
Marharyta V. Laktsevich-Iskryk ◽  
Nastassia A. Varabyeva ◽  
Volha V. Kazlova ◽  
Vladimir N. Zhabinskii ◽  
Vladimir A. Khripach ◽  
...  
Keyword(s):  
Visible Light ◽  
Functional Groups ◽  
Ring Opening ◽  
Radical Intermediates ◽  
Reaction Proceeds

In this article, we report a photocatalytic protocol for the isomerization of 1,2-disubstituted cyclopropanols to linear ketones. The reaction proceeds <i>via</i> radical intermediates and tolerates various functional groups.

scholarly journals Environmentally benign and highly regioselective ring opening of epoxides accelerated by ultrasound irradiation

2016 ◽  
Vol 9 (1) ◽  
pp. 76-84 ◽  
Author(s):  
Mohamed Mahmoud Nasef ◽  
Masoumeh Zakeri ◽  
Jahanbakhsh Asadi ◽  
Ebrahim Abouzari-Lotf ◽  
Arshad Ahmad ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ultrasound Irradiation ◽  
Environmentally Benign ◽  
Ring Opening Of Epoxides
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