H
H. Ishibashi
Researcher at Tohoku University
Publications - 13
Citations - 198
H. Ishibashi is an academic researcher from Tohoku University. The author has contributed to research in topics: Total synthesis & Enantioselective synthesis. The author has an hindex of 7, co-authored 13 publications receiving 198 citations.
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Journal ArticleDOI
A remarkable substituent effect on the enantioselectivity of tandem asymmetric epoxidation and enantiospecific ring expansion of cyclopropylidene alcohols: a new enantiocontrolled synthesis of (-)-debromoaplysin and (-)-aplysin
TL;DR: A remarkable substituent effect by the tert-butyldimethylsiloxy group on the enantioselectivity of the tandem asymmetric epoxidation and enantiospecific ring expansion of 2-[2-cyclopropylideneethanol]-2-hydroxymethylcyclobutanone in high yield and high enantiomeric excess was observed.
Journal ArticleDOI
A concise and enantioselective approach to cyclobutanones by tandem asymmetric epoxidation and enantiospecific ring expansion of cyclopropylidene alcohols. An enantiocontrolled synthesis of (+)-and (-)-α-cuparenones
TL;DR: In this article, a tandem Katsuli-Sharpless asymmetric epoxidation and enantiospecific ring expansion of 2-alkyl(or 2-aryl)-2-cyclopropylideneethanols (1a-i) afforded chiral 1-alky(or 1-aryl)1-(hydroxymethyl)cyclobutanones (3a)-i) in high yields and high enantiomeric excess.
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An enantioselective synthesis of (R)- and (S)-4,5-dimethyl-4-hexanolides-Key intermediates for 2,3-dihydro-2-isopropyl-2,5-dimethylfuran, a sex specific compound in females of the beetle Hylecoetus dermestoides L
TL;DR: Both the enantiomers, (R)- and (S)-4,5-dimethyl-4-hexanolides (11) were synthesized via tandem asymmetric epoxidation and enantiospecific 1,2-rearrangement of cyclopropylideneethanol (7) as a key reaction as mentioned in this paper.
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A Novel Approach to Quaternary Substituted Chiral Cyclobutanes. A Formal Enantioselective Total Synthesis of 1,3-Dioxole Pheromone, (-)-Frontalin
TL;DR: A novel synthesis of the quaternary substituted chiral cyclobutanone was achieved by the concerted ring expansion of the chiralcyclopropyl epoxide (CHE) as discussed by the authors, which led to a formal total synthesis of (-)-frontalin.
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Ring expansion of cyclopropylmethanols to cyclobutanes—an enantioselective total synthesis of (R)-(+)-dodecan-5-olide, and (S)-(+)- and (R)-(–)-5-[(Z)-dec-1-enyl]dihydrofuran-2(3H)-one
TL;DR: In this paper, a ring expansion of cyclopropylmethanols was developed, leading to an enantioselective total synthesis of (R) −(+)-dodecan-5-olide (25), and (S)-(+) and (R)-(S)- (Z)-dec-dec-1-enyl]dihydrofuran-2(3H)-one (35) and the pheromone of the Japanese beetle.