Search

Your search keyword '"Akiyama, Takahiko"' showing total 3 results
Start Over Author "Akiyama, Takahiko" Topic phosphoric acid Publisher georg thieme verlag stuttgart
3 results on '"Akiyama, Takahiko"'

1. Enantioselective Mannich-Type Reaction Catalyzed by a Chiral Phosphoric Acid Bearing an (S)-Biphenol Backbone.

Author

Akiyama, Takahiko

Subjects
*ENANTIOSELECTIVE catalysis, *MANNICH reaction, *ASYMMETRIC synthesis, *CHIRALITY, *PHOSPHORIC acid, *PHENOL, *KETENES, *IMINES
Abstract

A novel chiral phosphoric acid bearing a biphenol backbone was synthesized and its catalytic activity was investigated in the enantioselective Mannich-type reaction of ketene silyl acetals with aldimines. [ABSTRACT FROM AUTHOR]

Published
2009
Full Text
View/download PDF

2. Enantioselective Mannich-Type Reaction Catalyzed by a Chiral Phosphoric Acid Bearing an (S)-Biphenol Backbone.

Author

Akiyama, Takahiko, Katoh, Takuya, Mori, Keiji, and Kanno, Kazuaki

Subjects
*PHOSPHORIC acid, *PHENOLS, *CHEMICAL synthesis, *MANNICH reaction, *KETENES, *SILYL group, *ALDIMINES
Abstract

A novel chiral phosphoric acid bearing a biphenol backbone was synthesized and its catalytic activity was investigated in the enantioselective Mannich-type reaction of ketene silyl acetals with aldimines. [ABSTRACT FROM AUTHOR]

Published
2009
Full Text
View/download PDF

3. Enantioselective Synthesis of 1-Substituted 1,2,3,4-Tetrahydroisoquinolines through 1,3-Dipolar Cycloaddition by a Chiral Phosphoric Acid.

Author

Jin, Yuan, Honma, Yasuhiro, Morita, Hisashi, Miyagawa, Masamichi, and Akiyama, Takahiko

Subjects
*TETRAHYDROISOQUINOLINES, *ISOXAZOLIDINES, *PHOSPHORIC acid, *RING formation (Chemistry), *ASYMMETRIC synthesis, *VINYL ethers
Abstract

A new approach is described for the asymmetric synthesis of 1-substituted 1,2,3,4-tetrahydroisoquinolines that is based on the enantioselective 1,3-dipolar cycloaddition reaction of a nitrone and a vinyl ether in the presence of a chiral phosphoric acid that gives the chiral tetrahydroisoquinolines in high yields and with high enantioselectivities.1 H and31 P NMR analyses of the mixture of nitrone and chiral phosphoric acid suggest the formation of a 1:1 complex. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results