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Your search keyword '"Enrique Alvarez-Manzaneda"' showing total 7 results
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7 results on '"Enrique Alvarez-Manzaneda"'

1. Synthesis of Phenol Abietane Diterpenes Based on the Oxidative Radical Cyclization Utilizing the Mn(OAc)3/Ac2O System

Author

Esteban Alvarez, Eduardo Cabrera, Ibtissam Messouri, Mohammed Lachkar, Ramón Alvarez-Manzaneda, Rachid Chahboun, and Enrique Alvarez-Manzaneda

Subjects
chemistry.chemical_compound, chemistry, Organic Chemistry, chemistry.chemical_element, Organic chemistry, Phenol, Phenols, Oxidative phosphorylation, Manganese, Radical cyclization, Abietane
Abstract

A new route to phenol abietane diterpenes from trans-communic acid is reported. The key step is the transformation of a β-ketoester into the corresponding O-acetylsalicilate, via a manganese(III)-based oxidative free-radical cyclization carried out in AC 2 O. Utilizing this, the first synthesis of (-)-sugikurojin A has been achieved. The immunosuppressor 19-hydroxyferruginol has also been synthesized.

Published
2007
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2. Cerium(IV) Ammonium Nitrate (CAN): A Very Efficient Reagent for the Synthesis of Tertiary Ethers

Author

R. Chaboun, Jose Miguel Ramos, Ali Haidour, Eduardo Cabrera, Enrique Alvarez-Manzaneda, Esteban Alvarez, and Ramón Alvarez-Manzaneda

Subjects
Ammonium nitrate, Organic Chemistry, chemistry.chemical_element, General Medicine, Tetrahydropyran, chemistry.chemical_compound, Cerium, Caparrapi oxide, chemistry, Reagent, Yield (chemistry), Organic chemistry, Stereoselectivity, Tetrahydrofuran
Abstract

Treatment of tertiary 1,4- and 1,5-diols with cerium ammonium nitrate at room temperature led to the corresponding tetrahydrofuran and tetrahydropyran derivatives in high yield and stereoselectivity. Utilizing this methodology, manoyl oxide (25a) and a variety of fragrant compounds, such as linalool oxide (8), caparrapi oxide (12), ambrox (14) and other related amber-gris-type odorants have been synthesized; 16 examples are described.

Published
2006
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7. Synthesis of Phenol Abietane Diterpenes Based on the Oxidative Radical Cyclization Utilizing the Mn(OAc)3/Ac2O System.

Author

Enrique Alvarez-Manzaneda

Subjects
PHENOL, DITERPENES, ASPIRIN, CYCLOPOLYMERIZATION
Abstract

A new route to phenol abietane diterpenes from TRANS-communic acid is reported. The key step is the transformation of a ?-ketoester into the corresponding O-acetylsalicilate, via a manganese(III)-based oxidative free-radical cyclization carried out in Ac 2O. Utilizing this, the first synthesis of (-)-sugikurojin A has been achieved. The immunosuppressor 19-hydroxyferruginol has also been synthesized. [ABSTRACT FROM AUTHOR]

Published
2007
Full Text
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