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New perspective for natural products synthesis: concise synthesis of (+)-sch 642305 by chiral auxiliary multiuse methodology.
The synthesis of (+)-Sch 642305 is an example of chiral auxiliary multiuse methodology, which shows a new perspective for the synthesis of compounds with multiple asymmetric centers. Thus, (+)-SchExpand
Asymmetric total synthesis of clavolonine.
The asymmetric total synthesis of clavolonine (1) has been achieved based on chiral auxiliary multiple-use methodology. Our synthetic route features stereoselective transformations on the cyclohexaneExpand
Stereoselective synthesis of cis-2,5-disubstituted THFs: application to adjacent bis-THF cores of Annonaceous acetogenins.
The iodocyclization of γ,δ-unsaturated alcohols in the presence of a silyl enol ether produced cis-2,5-disubstituted tetrahydrofurans in one pot via siloxy intermediates. N-Iodosuccinimide (NIS)Expand
A highly efficient macrolactonization method via ethoxyvinyl ester.
We present the highly efficient reaction procedure of the macrolactonization method via ethoxyvinyl esters (EVEs). The following procedure was performed: 1) The EVE was prepared fromExpand
Discovery of Potent and Centrally Active 6-Substituted 5-Fluoro-1,3-dihydro-oxazine β-Secretase (BACE1) Inhibitors via Active Conformation Stabilization.
β-Secretase (BACE1) has an essential role in the production of amyloid β peptides that accumulate in patients with Alzheimer's disease (AD). Thus, inhibition of BACE1 is considered to be aExpand
The first asymmetric total syntheses of both enantiomers of cryptocaryone
The first asymmetric total syntheses of the (+)- and (−)-cryptocaryones are described. Removal of the acetal unit of the enone acetal 5, which was obtained in our previous study from theExpand
Asymmetric total synthesis of (-)-stenine and 9a-epi-stenine.
A route for the asymmetric synthesis of (-)-stenine, a member of the Stemona alkaloid family used as folk medicine in Asian countries, is described. The key features of the sequence employed includeExpand
Cerium ammonium nitrate (CAN) for mild and efficient reagent to remove hydroxyethyl units from 2-hydroxyethyl ethers and 2-hydroxyethyl amines
Abstract Cerium ammonium nitrate (CAN) removed hydroxyethyl units from 2-hydroxyethyl ethers and 2-hydroxyethyl amines to produce alcohols and amines in good yields. Especially, removal of theExpand
Intramolecular iodoetherification of ene or diene ketals: facile synthesis of spiroketals.
A novel and rapid approach to chiral mono- or di-substituted spiroketals based on remote asymmetric induction by intramolecular iodoetherification of ene or diene ketals has been developed. ThisExpand
Facile formation of tetrahydrofurans with multiple chiral centers using double iodoetherification of σ-symmetric diene acetals : short asymmetric total synthesis of rubrenolide and rubrynolide
Abstract A novel double intramolecular iodoetherification of σ-symmetric diene acetals from (R,R)-hydrobenzoin occurred in highly diastereoselective manners to give tetrahydrofuran moieties withExpand
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