The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Weisheng Tian - One of the best experts on this subject based on the ideXlab platform.
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Total synthesis of (±)-dihydrospiniferin-1 via a polyfluoro alkanosulfonyl fluoride induced tandem carbonium ion rearrangement reaction
Chemical Communications, 2003Co-Authors: Ling Chen, Kai Ding, Weisheng TianAbstract:A novel polyfluoroalkanosulfonyl fluoride induced carbonium ion rearrangement reaction of γ-hydroxymethyl Cyclohexenone has been used for the total synthesis of (±)dihydrospiniferin 1
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total synthesis of dihydrospiniferin 1 via a polyfluoro alkanosulfonyl fluoride induced tandem carbonium ion rearrangement reaction
Chemical Communications, 2003Co-Authors: Ling Chen, Kai Ding, Weisheng TianAbstract:A novel polyfluoroalkanosulfonyl fluoride induced carbonium ion rearrangement reaction of γ-hydroxymethyl Cyclohexenone has been used for the total synthesis of (±)dihydrospiniferin 1
Jariya Sakayaroj - One of the best experts on this subject based on the ideXlab platform.
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amide Cyclohexenone and Cyclohexenone sordaricin derivatives from the endophytic fungus xylaria plebeja psu g30
ChemInform, 2014Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Two new Cyclohexenones, named xylariacyclones A (Ia) and B (Ib), three Cyclohexenone—sordaricin derivatives, named xylarinonericins A (IIa), B (IIb), and C (IIc), as well as xylariamide (III) are isolated along with 11 known compounds from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30.
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Amide, Cyclohexenone, and Cyclohexenone—Sordaricin Derivatives from the Endophytic Fungus Xylaria plebeja PSU‐G30.
ChemInform, 2014Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Two new Cyclohexenones, named xylariacyclones A (Ia) and B (Ib), three Cyclohexenone—sordaricin derivatives, named xylarinonericins A (IIa), B (IIb), and C (IIc), as well as xylariamide (III) are isolated along with 11 known compounds from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30.
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amide Cyclohexenone and Cyclohexenone sordaricin derivatives from the endophytic fungus xylaria plebeja psu g30
Tetrahedron, 2013Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Abstract Six new compounds, two Cyclohexenones, named xylariacyclones A (1) and B (2), three Cyclohexenone–sordaricin derivatives, named xylarinonericins A–C (3–5), and one amide derivative, named xylariamide (6), together with 11 known compounds were isolated from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30. The structures were elucidated by analyses of NMR spectroscopic data and chemical methods. Compounds 3–5 are novel and unusual sodaricin derivatives with an ester moiety at C-6 of the sordaricin skeleton. In addition, compound 5 has a unique feature with an ester unit instead of an ether group at C-19. They were evaluated for antifungal activity against Candida albicans ATCC90028 and Cryptococcus neoformans ATCC90113.
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Amide, Cyclohexenone, and Cyclohexenone–sordaricin derivatives from the endophytic fungus Xylaria plebeja PSU-G30
Tetrahedron, 2013Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Abstract Six new compounds, two Cyclohexenones, named xylariacyclones A (1) and B (2), three Cyclohexenone–sordaricin derivatives, named xylarinonericins A–C (3–5), and one amide derivative, named xylariamide (6), together with 11 known compounds were isolated from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30. The structures were elucidated by analyses of NMR spectroscopic data and chemical methods. Compounds 3–5 are novel and unusual sodaricin derivatives with an ester moiety at C-6 of the sordaricin skeleton. In addition, compound 5 has a unique feature with an ester unit instead of an ether group at C-19. They were evaluated for antifungal activity against Candida albicans ATCC90028 and Cryptococcus neoformans ATCC90113.
Ling Chen - One of the best experts on this subject based on the ideXlab platform.
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Total synthesis of (±)-dihydrospiniferin-1 via a polyfluoro alkanosulfonyl fluoride induced tandem carbonium ion rearrangement reaction
Chemical Communications, 2003Co-Authors: Ling Chen, Kai Ding, Weisheng TianAbstract:A novel polyfluoroalkanosulfonyl fluoride induced carbonium ion rearrangement reaction of γ-hydroxymethyl Cyclohexenone has been used for the total synthesis of (±)dihydrospiniferin 1
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total synthesis of dihydrospiniferin 1 via a polyfluoro alkanosulfonyl fluoride induced tandem carbonium ion rearrangement reaction
Chemical Communications, 2003Co-Authors: Ling Chen, Kai Ding, Weisheng TianAbstract:A novel polyfluoroalkanosulfonyl fluoride induced carbonium ion rearrangement reaction of γ-hydroxymethyl Cyclohexenone has been used for the total synthesis of (±)dihydrospiniferin 1
Fumie Sato - One of the best experts on this subject based on the ideXlab platform.
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Asymmetric synthesis of palitantin from the (5R)-tert-butyldimethylsiloxy-2-Cyclohexenone
Tetrahedron Letters, 1999Co-Authors: Georges P.‐j. Hareau, Masakazu Koiwa, Takeshi Hanazawa, Fumie SatoAbstract:Abstract (+)-Palitantin (2) has been synthesized in 25% overall yield from the (5R)-tert-butyldimethylsiloxy-2-Cyclohexenone [(R)-1] where a remarkable diastereoselective cat. OsO4 cis-dihydroxylation of (R)-1 furnished the precursor of the optically pure (5R,6R)-bis-trimethylsiloxy 2-Cyclohexenone (7) which underwent highly selectively the 1,4-addition reaction of the 1,3-heptadienyl cyanocuprate to give, after trapping of the corresponding copper enolate with formaldehyde, the target compound.
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synthesis of optically active 5 tert butyldimethylsiloxy 2 Cyclohexenone and its 6 substituted derivatives as useful chiral building blocks for the synthesis of cyclohexane rings syntheses of carvone penienone and penihydrone
Journal of the American Chemical Society, 1999Co-Authors: Georges P J Hareau, Shinichi Hikichi, Masakazu Koiwa, Fumie SatoAbstract:Optically active 5-(tert-butyldimethylsiloxy)-2-Cyclohexenone (1) and its 6-substituted derivatives 2a,b were synthesized from the readily available optically active ethyl 3-(tert-butyldimethylsiloxy)-5-hexenoate (4), where the Ti(II)-mediated intramolecular nucleophilic acyl substitution reaction and the FeCl3-mediated ring expansion reaction of a 1-hydroxybicyclo[3.1.0]hexane are the key reactions. The enone 1 reacted with higher-order cyanocuprates with excellent diastereoselectivity to afford the trans-addition products, trans-13, in excellent yields. The reaction of 1 with lower-order cyanocuprates proceeded with moderate to excellent syn-selectivity to afford cis-13. Treatment of trans- and cis-13 with DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) or catalyst p-TSA (p-toluenesulfonic acid) resulted in a β-elimination reaction to furnish the corresponding optically active 5-substituted-2-Cyclohexenones 14. The 1,4-addition reaction of 2a and 2b with organocyanocuprates followed by treatment of the resulti...
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unexpected cis selective 1 4 addition reaction of lower order cyanocuprates to optically active 5 tert butyldimethylsiloxy 2 Cyclohexenone
Angewandte Chemie, 1998Co-Authors: Georges Hareauvittini, Shinichi Hikichi, Fumie SatoAbstract:: A remarkable cis selectivity has been observed in the 1,4-addition of lower order primary and secondary alkylcyanocuprates to 5-silyloxy- and 5-benzyloxy-substituted Cyclohexenones. This enables the preparation of both enantiomers of the corresponding 5-alkyl-substituted Cyclohexenones (S)- and (R)-3 by the reaction of the readily available 5-(tert-butyldimethylsiloxy)-2-Cyclohexenone (1) with either the lower or higher order cyanocuprate. DBU=1,8-diazabicyclo[5.4.0]undec-7-ene.
Vatcharin Rukachaisirikul - One of the best experts on this subject based on the ideXlab platform.
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amide Cyclohexenone and Cyclohexenone sordaricin derivatives from the endophytic fungus xylaria plebeja psu g30
ChemInform, 2014Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Two new Cyclohexenones, named xylariacyclones A (Ia) and B (Ib), three Cyclohexenone—sordaricin derivatives, named xylarinonericins A (IIa), B (IIb), and C (IIc), as well as xylariamide (III) are isolated along with 11 known compounds from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30.
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Amide, Cyclohexenone, and Cyclohexenone—Sordaricin Derivatives from the Endophytic Fungus Xylaria plebeja PSU‐G30.
ChemInform, 2014Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Two new Cyclohexenones, named xylariacyclones A (Ia) and B (Ib), three Cyclohexenone—sordaricin derivatives, named xylarinonericins A (IIa), B (IIb), and C (IIc), as well as xylariamide (III) are isolated along with 11 known compounds from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30.
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amide Cyclohexenone and Cyclohexenone sordaricin derivatives from the endophytic fungus xylaria plebeja psu g30
Tetrahedron, 2013Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Abstract Six new compounds, two Cyclohexenones, named xylariacyclones A (1) and B (2), three Cyclohexenone–sordaricin derivatives, named xylarinonericins A–C (3–5), and one amide derivative, named xylariamide (6), together with 11 known compounds were isolated from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30. The structures were elucidated by analyses of NMR spectroscopic data and chemical methods. Compounds 3–5 are novel and unusual sodaricin derivatives with an ester moiety at C-6 of the sordaricin skeleton. In addition, compound 5 has a unique feature with an ester unit instead of an ether group at C-19. They were evaluated for antifungal activity against Candida albicans ATCC90028 and Cryptococcus neoformans ATCC90113.
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Amide, Cyclohexenone, and Cyclohexenone–sordaricin derivatives from the endophytic fungus Xylaria plebeja PSU-G30
Tetrahedron, 2013Co-Authors: Vatcharin Rukachaisirikul, Sathit Buadam, Souwalak Phongpaichit, Jariya SakayarojAbstract:Abstract Six new compounds, two Cyclohexenones, named xylariacyclones A (1) and B (2), three Cyclohexenone–sordaricin derivatives, named xylarinonericins A–C (3–5), and one amide derivative, named xylariamide (6), together with 11 known compounds were isolated from the broth extract of the endophytic fungus Xylaria plebeja PSU-G30. The structures were elucidated by analyses of NMR spectroscopic data and chemical methods. Compounds 3–5 are novel and unusual sodaricin derivatives with an ester moiety at C-6 of the sordaricin skeleton. In addition, compound 5 has a unique feature with an ester unit instead of an ether group at C-19. They were evaluated for antifungal activity against Candida albicans ATCC90028 and Cryptococcus neoformans ATCC90113.
