The Experts below are selected from a list of 84 Experts worldwide ranked by ideXlab platform
Jean Rodriguez - One of the best experts on this subject based on the ideXlab platform.
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Microwave‐Assisted Domino Benzannulation of α‐Oxo Ketenes: Preparation of 1,3‐Dihydro‐2H‐1,5‐benzodiazepin‐2‐ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diketones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
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Microwave-Assisted Domino Benzannulation of α-Oxo Ketenes: Preparation of 1,3-Dihydro-2H-1,5-benzodiazepin-2-ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diket- ones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
Juan-carlos Castillo - One of the best experts on this subject based on the ideXlab platform.
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Microwave‐Assisted Domino Benzannulation of α‐Oxo Ketenes: Preparation of 1,3‐Dihydro‐2H‐1,5‐benzodiazepin‐2‐ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diketones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
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Microwave-Assisted Domino Benzannulation of α-Oxo Ketenes: Preparation of 1,3-Dihydro-2H-1,5-benzodiazepin-2-ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diket- ones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
Hiroshi Miyasaka - One of the best experts on this subject based on the ideXlab platform.
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Direct observation of photoionization dynamics in solution phase induced by femtosecond two-photon excitation
EPJ Web of Conferences, 2019Co-Authors: Masafumi Koga, Yusuke Yoneda, Hikaru Sotome, Hiroshi MiyasakaAbstract:In solution phase, the solute can be photo-ionized in the lower excitation energy than its ionization potential in gas phase. Therefore, the specific interaction is expected to be exist between the surrounding media and higher excited (Sn) state of the solute. In order to elucidate such polarization effect of solvent on the photoionization process, femtosecond double-pulse excitation was applied to direct detection of low-energy photoionization dynamics of a Phenylenediamine Derivative in solution phase. From the results of the transient absorption change, in polar solvent, it is clearly indicated that photoionization does not proceed directly from the Sn state, but through specific intermediate state. Moreover,
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Ionization dynamics of a Phenylenediamine Derivative in solutions as revealed by femtosecond simultaneous and stepwise two-photon excitation.
Physical chemistry chemical physics : PCCP, 2019Co-Authors: Masafumi Koga, Yusuke Yoneda, Hikaru Sotome, Hiroshi MiyasakaAbstract:Femtosecond transient absorption spectroscopy with off-resonant simultaneous and resonant stepwise two-photon excitation methods were applied to the direct observation of photoionization dynamics of a Phenylenediamine Derivative in n-hexane, ethanol and acetonitrile solutions. Upon the selective excitation of the solute via the off-resonant two-photon excitation to the energy level almost equivalent with the ionization potential in the gas phase, rapid appearance of the radical cation (within ca. 100–200 fs) was observed in polar and nonpolar solutions. On the other hand, in the case where the excited energy level from the ground state is 0.8 eV lower than the ionization potential in the gas phase, the radical cation appears only in polar solutions in sub-ps to ps time scales, indicating that the photoionization does not occur directly from the highly electronically excited state even in the polar solution. Comparison of the dynamics between ethanol and acetonitrile solutions strongly suggested that the solvation process of the precursor species leading to the ionization took a crucial role in the electron ejection process with lower energy in polar solutions.
Marc Presset - One of the best experts on this subject based on the ideXlab platform.
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Microwave‐Assisted Domino Benzannulation of α‐Oxo Ketenes: Preparation of 1,3‐Dihydro‐2H‐1,5‐benzodiazepin‐2‐ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diketones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
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Microwave-Assisted Domino Benzannulation of α-Oxo Ketenes: Preparation of 1,3-Dihydro-2H-1,5-benzodiazepin-2-ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diket- ones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
Yoann Coquerel - One of the best experts on this subject based on the ideXlab platform.
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Microwave‐Assisted Domino Benzannulation of α‐Oxo Ketenes: Preparation of 1,3‐Dihydro‐2H‐1,5‐benzodiazepin‐2‐ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diketones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
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Microwave-Assisted Domino Benzannulation of α-Oxo Ketenes: Preparation of 1,3-Dihydro-2H-1,5-benzodiazepin-2-ones
European Journal of Organic Chemistry, 2012Co-Authors: Juan-carlos Castillo, Marc Presset, Rodrigo Abonia, Yoann Coquerel, Jean RodriguezAbstract:The microwave irradiation of a series of 2-diazo-1,3-diket- ones in the presence of an o-Phenylenediamine Derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.