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Your search keyword '"Ishii, Jun-ichi"' showing total 2 results
Start Over Author "Ishii, Jun-ichi" Publisher american chemical society
2 results on '"Ishii, Jun-ichi"'

1. Cp*RuCl-catalyzed formal intermolecular cyclotrimerization of three unsymmetrical alkynes through a Boron temporary tether: Regioselective four-component coupling synthesis of phthalides

Author

Yamamoto, Yoshihiko, Ishii, Jun-ichi, Nishiyama, Hisao, and Itoh, Kenji

Subjects
Ruthenium -- Chemical properties, Palladium catalysts -- Chemical properties, Chemistry
Abstract

Highly substituted phthalides are efficiently synthesized by sequential Cp*RuCl-catalyzed cyclotrimerization of alkynylboronates, propargyl alcohols, and terminal alkynes and palladium(II) catalyzed carbonylation of the resultant arylboronates. The perfect regioselectivity of the ruthenium-catalyzed formal intermolecular cyclotrimerization is discussed on the basis of the density functional calculations of a boraruthenacycle intermediate.

Published
2005

2. Ru(II)-catalyzed chemo- and regioselective cyclotrimerization of three unsymmetrical alkynes through boron temporary tether. One-pot four-component coupling via cyclotrimerization/suzuki-miyaura coupling

Author

Yamamoto, Yoshihiko, Ishii, Jun-ichi, Nishiyama, Hisao, and Itoh, Kenji

Subjects
Chemical reactions -- Analysis, Benzene -- Analysis, Metal catalysts -- Analysis, Ruthenium -- Analysis, Chemistry
Abstract

The chemo-and regioselective catalytic cyclomerization of unsymmetrical three alkyne components, by means of the temporary tethering approach with ruthenium catalysis is reported. The catalytic intermolecular cyclotrimerization of three different unsymmetrical alkynes can be accomplished with the help of ruthenium catalysis.

Published
2004

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