Faculty Profiles - SAITO, Susumu

Papers - SAITO, Susumu

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Aluminum trisphenoxide polymer as a Lewis acidic, solid catalyst Reviewed

S Saito, M Murase, H Yamamoto

SYNLETT ( 1 ) page： 57 - 58 1999.1

Conjugate addition of lithium enolates to aromatic carbonyl compounds complexed with aluminum tris(2,6-diphenylphenoxide) (ATPH) Reviewed

S Saito, T Sone, K Shimada, H Yamamoto

SYNLETT ( 1 ) page： 81 - 83 1999.1

Aluminum trisphenoxide polymer as a Lewis acidic, solid catalyst Invited Reviewed

Saito, S; Murase, M; Yamamoto, H

SYNLETT ( 1 ) page： 57 - 58 1999.1

Conjugate addition of lithium enolates to aromatic carbonyl compounds complexed with aluminum tris(2,6-diphenylphenoxide) (ATPH) Invited Reviewed

Saito, S; Sone, T; Shimada, K; Yamamoto, H

SYNLETT ( 1 ) page： 81 - 83 1999.1

Mixed crossed aldol condensation between conjugated esters and aldehydes using aluminum tris(2,6-diphenylphenoxide) Reviewed

Susumu Saito, Masahito Shiozawa, Hisashi Yamamoto

Angewandte Chemie - International Edition Vol. 38 ( 12 ) page： 1769 - 1771 1999

Language：English Publishing type：Research paper (scientific journal)

The combined use of aluminum tris(2,6-diphenylphenoxide) (ATPH) and lithium 2,2,6,6-tetramethylpiperidide (LTMP) has proven to be effective for the mixed crossed aldol condensation between conjugated esters and various aldehydes. An example is shown in Equation (1).

DOI： 10.1002/(SICI)1521-3773(19990614)38:12<1769::AID-ANIE1769>3.0.CO;2-0

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Mixed Aldol Condensation of α, β-Unsaturated Esters with Aldehydes Using Aluminum Tris(2,6-diphenylphenoxide)(ATPH). Reviewed

Susumu Saito, Masahito Shiozawa, Hisashi Yamammoto

Angew. Chem. Int. Ed. Engl. Vol. 38 page： 1769-1771 1999

Designer Lewis acids for selective organic synthesis Reviewed

H Yamamoto, A Yanagisawa, K Ishihara, S Saito

PURE AND APPLIED CHEMISTRY Vol. 70 ( 8 ) page： 1507 - 1512 1998.8

Conceptually new directed aldol condensation using aluminum tris(2,6-diphenylphenoxide) Reviewed

S Saito, M Shiozawa, M Ito, H Yamamoto

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Vol. 120 ( 4 ) page： 813 - 814 1998.2

Diastereoselective aldol reaction with an acetate enolate: 2,6-bis(2-isopropylphenyl)-3,5-dimethylphenol as an extremely effective chiral auxiliary Reviewed

S Saito, K Hatanaka, T Kano, H Yamamoto

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION Vol. 37 ( 24 ) page： 3378 - 3381 1998

Designer Lewis acid catalysts - bulky aluminium reagents for selective organic synthesis Reviewed

S Saito, H Yamamoto

CHEMICAL COMMUNICATIONS ( 17 ) page： 1585 - 1592 1997.9

Language：English Publishing type：Research paper (scientific journal) Publisher：ROYAL SOC CHEMISTRY

Sterically hindered aluminium aryloxides have been developed as designer Lewis acid catalysts for stereo-, regio- and chemo-selective carbon-carbon bond-forming reactions. Compared with classical Lewis acids, these aluminium reagents coordinate strongly with various oxygen-containing substrates, and this coordination is affected by the steric environment of their ligands, The carbonyl groups of the bound substrates are either electronically activated or sterically deactivated depending on the aluminium reagent used and the type of reaction, Designer chiral catalysts based on the structure of these bulky aluminium reagents have also been examined.

Web of Science

2,6-bis(2-alkylphenyl)-3,5-dimethylphenol as a new chiral phenol with C-2-symmetry. Application to the asymmetric alkylation of aldehydes Invited Reviewed

Saito, S; Kano, T; Hatanaka, K; Yamamoto, H

JOURNAL OF ORGANIC CHEMISTRY Vol. 62 ( 16 ) page： 5651 - 5656 1997.8

2,6-bis(2-alkylphenyl)-3,5-dimethylphenol as a new chiral phenol with C-2-symmetry. Application to the asymmetric alkylation of aldehydes Reviewed

S Saito, T Kano, K Hatanaka, H Yamamoto

JOURNAL OF ORGANIC CHEMISTRY Vol. 62 ( 16 ) page： 5651 - 5656 1997.8

A new synthetic route to allylsilanes: The reaction of silyllithium reagents with aromatic carbonyl compounds and aluminium tris(2,6-diphenylphenoxide) (ATPH) Invited Reviewed

Saito, S; Shimada, K; Yamamoto, H; deMarigorta, EM; Fleming, I

CHEMICAL COMMUNICATIONS ( 14 ) page： 1299 - 1300 1997.7

A new synthetic route to allylsilanes: The reaction of silyllithium reagents with aromatic carbonyl compounds and aluminium tris(2,6-diphenylphenoxide) (ATPH) Reviewed

S Saito, K Shimada, H Yamamoto, EM deMarigorta, Fleming, I

CHEMICAL COMMUNICATIONS ( 14 ) page： 1299 - 1300 1997.7

Regioselective Robinson annulation realized by the combined use of lithium enolates and aluminum tris(2,6-diphenylphenoxide) (ATPH) Reviewed

S Saito, Shimada, I, Y Takamori, M Tanaka, K Maruoka, H Yamamoto

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN Vol. 70 ( 7 ) page： 1671 - 1681 1997.7

Language：English Publishing type：Research paper (scientific journal) Publisher：CHEMICAL SOC JAPAN

Michael addition of lithium enolates derived from ketones to a variety of alpha, beta-unsaturated ketones was realized in the presence of aluminum tris(2,6-diphenylphenoxide) (ATPH). In this reaction, ATPH can be used as a carbonyl protector of alpha, beta-unsaturated carbonyl substrates upon complexation, which facilitates the regioselective 1,4-addition of lithium enolates to Michael accepters. Similarly, dianions of beta-dicarbonyl compounds undergo Michael addition smoothly using ATPH as an effective promoter of the reaction. Subsequent regioselective, intramolecular aldol condensation was also demonstrated, leading to bicyclic carbon ring systems. Such systems are difficult to obtain by the Robinson annulation usually performed in protic media.

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A new annulation based on a one-pot double Michael addition using aluminum tris(2,6-diphenylphenoxide) (ATPH) Reviewed

S Saito, M Shiozawa, Y Takamori, H Yamamoto

SYNLETT ( 4 ) page： 359 - + 1997.4

Selective alkylation of ketones with a bulky aluminum reagent - The THF-TBSOTf system Reviewed

S Saito, M Ito, K Maruoka, H Yamamoto

SYNLETT ( 4 ) page： 357 - + 1997.4

A new annulation based on a one-pot double Michael addition using aluminum tris(2,6-diphenylphenoxide) (ATPH) Invited Reviewed

Saito, S; Shiozawa, M; Takamori, Y; Yamamoto, H

SYNLETT ( 4 ) page： 359 - + 1997.4

Highly regioselective alkylation at the more-hindered alpha-site of unsymmetrical ketones by the combined use of aluminum tris(2,6-diphenylphenoxide) and lithium diisopropylamide Reviewed

S Saito, M Ito, H Yamamoto

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Vol. 119 ( 3 ) page： 611 - 612 1997.1

Aluminum tris(4-bromo-2,6-diphenylphenoxide)(ATPH-Br): An effective catalyst for claisen rearrangement Reviewed

S Saito, K Shimada, H Yamamoto

SYNLETT ( 8 ) page： 720 - + 1996.8

Language：English Publishing type：Research paper (scientific journal) Publisher：GEORG THIEME VERLAG KG

A new Lewis acidic receptor, aluminum tris(4-bromo-2,6-diphenylphenoxide)(ATPH-Br), is a powerful promoter of the Claisen rearrangement of various allyl vinyl ethers and is effective for controlling the stereochemistry of the resulting rearrangement products.

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Papers - SAITO, Susumu