Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Hidehiro Arai"'
Autor:
Hidehiro Arai, Koichiro Morihira, Yusuke Nakamura, Yasuhiro Kataoka, Yoshiaki Horiguchi, Isao Kuwajima
Publikováno v:
ChemInform. 24
Lewis acid-mediated intramolecular cyclization of the dienol silyl ether or enol silyl ether and the acetal for medium-sized ring formation is described. Seven-, eight-, and nine-membered ring cyclization proceed in fairly good yields.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f8e090f0158c7da7e71fe1c5bfc09c3
https://doi.org/10.1002/chin.199315104
https://doi.org/10.1002/chin.199315104
Publikováno v:
ChemInform. 31
Optically active novel 18-demethyltaxiods were successfully synthesized from 2α,10β-dibenzyloxy-11β-(t-butyldimethylsiloxy)-7β-hydroxy-1α-(p-methoxybenzyloxy)-8β,15,15-trimethyl-4-methylene-trans-bicyclo[6.4.0]dodecan-9-one (2) which correspond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e29504f1181cdcb3486487d566b1e40
https://doi.org/10.1002/chin.200005196
https://doi.org/10.1002/chin.200005196
Publikováno v:
ChemInform. 32
Unsymmetrical alkyl 2-hydroxy-1-(1-hydroxyalkyl)alkyl ketones (bis-aldols) are successfully synthesized by way of sequential two aldol reactions using α-bromo ketones and two different aldehydes. In the first reaction, α-bromo-β-stannyloxy ketones
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1b483d2d47ae05202fcb459d9639c6a
https://doi.org/10.1002/chin.200124103
https://doi.org/10.1002/chin.200124103
Publikováno v:
ChemInform. 33
Methyl 1,2-dialkoxy-11,11-dimethyl-9-oxobicyclo[5.3.1]-undec-7-en-8-carboxylate 19 was synthesized by cesium fluoride-mediated intramolecular Knoevenagel reaction of methyl 4-(1,8-dialkoxy-2,2-dimethyl-3-oxocyclooctyl)-3-oxobutanonate 18.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::874657e5905575d355cae4a81a5eee84
https://doi.org/10.1002/chin.200224194
https://doi.org/10.1002/chin.200224194
Autor:
Hidehiro Arai, Yasuhiro Kataoka, Isao Kuwajima, Yusuke Nakamura, Yoshiaki Horiguchi, Koichiro Morihira
Publikováno v:
Tetrahedron Letters. 33:6979-6982
Lewis acid-mediated intramolecular cyclization of the dienol silyl ether or enol silyl ether and the acetal for medium-sized ring formation is described. Seven-, eight-, and nine-membered ring cyclization proceed in fairly good yields.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b38fb022c560daf165876cb538883eeb
https://doi.org/10.1016/s0040-4039(00)60911-5
https://doi.org/10.1016/s0040-4039(00)60911-5
Publikováno v:
ChemInform. 34
Double aldol reaction proceeded stereoselectively at one α-carbon of ketones to give α-(1-hydroxyalkyl)-β-hydroxyalkyl ketones (double aldols) in good to high yields by the following three methods: i) tin(II) trifluoromethanesulfonate-mediated ald
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1056b59bed9e62f5778830c6bdaaee4
https://doi.org/10.1002/chin.200319035
https://doi.org/10.1002/chin.200319035
Publikováno v:
ChemInform. 31
Unsymmetrical alkyl or aryl 2-hydroxy-1-(1-hydroxyalkyl)alkyl ketones (bis-aldols) were synthesized by the samarium(II) iodide-mediated aldol reaction of aldehydes with alkyl or aryl oxiranyl ketones. Bis-aldols were formed via the aldol reaction of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df083e50bca146dc3dd541d80296339b
https://doi.org/10.1002/chin.200039078
https://doi.org/10.1002/chin.200039078
Publikováno v:
Chemistry Letters. 31:92-93
Methyl 1,2-dialkoxy-11,11-dimethyl-9-oxobicyclo[5.3.1]-undec-7-en-8-carboxylate 19 was synthesized by cesium fluoride-mediated intramolecular Knoevenagel reaction of methyl 4-(1,8-dialkoxy-2,2-dimethyl-3-oxocyclooctyl)-3-oxobutanonate 18.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c85d3a7cede9a3b88c91182a6a2db1d8
https://doi.org/10.1246/cl.2002.92
https://doi.org/10.1246/cl.2002.92
Publikováno v:
Chemistry Letters. 31:82-83
A polyoxy eight-membered ring compound containing a bis-aldol skeleton, 2,6-dibenzyloxy-3-(t-butyldimethylsiloxy)-7-hydroxy-8-hydroxymethyl-5-(p-methoxybenzyloxy)-4,4-dimethylcyclooctanone 1, a key synthetic intermediate of 19-hydroxypaclitaxel, was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b98b14ca95a184002fd68a20fa8c35e6
https://doi.org/10.1246/cl.2002.82
https://doi.org/10.1246/cl.2002.82
Publikováno v:
Chemistry Letters. 30:118-119
Unsymmetrical alkyl 2-hydroxy-1-(1-hydroxyalkyl)alkyl ketones (bis-aldols) are successfully synthesized by way of sequential two aldol reactions using α-bromo ketones and two different aldehydes. In the first reaction, α-bromo-β-stannyloxy ketones
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5eb6b1ba102d03c2a8aa822c7e798e9b
https://doi.org/10.1246/cl.2001.118
https://doi.org/10.1246/cl.2001.118