Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Ritsuo Imashiro"'
Autor:
Tooru Kuroda, Tomiki Hashiyama, Masahiko Seki, Mari Kusama, Naoyuki Harada, Takeshi Yamanaka, Hiroaki Arakawa, Toshiyuki Furutani, Ritsuo Imashiro
Publikováno v:
Tetrahedron Letters. 42:8201-8205
A practical synthesis of methyl (2R,3S)-3-(4-methoxyphenyl)glycidate (−)-2a , a key intermediate for diltiazem ( 3 ), was described. Treatment of methyl (E)-4-methoxycinnamate (E)-1a with chiral dioxirane, generated in situ from a catalytic amount
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::588e302b6c9b3cb581875f40d452def4
https://doi.org/10.1016/s0040-4039(01)01762-2
https://doi.org/10.1016/s0040-4039(01)01762-2
Publikováno v:
The Journal of Organic Chemistry. 65:4213-4216
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70613ce04cf585fc404294a388399272
https://doi.org/10.1021/jo000192g
https://doi.org/10.1021/jo000192g
Publikováno v:
Tetrahedron Letters. 41:2149-2152
C 2 -Symmetric chiral binaphthyl ketones, efficient catalysts for asymmetric epoxidation, have been synthesized through an intramolecuar Ullmann reaction and/or a lipase-catalyzed enantioselective hydrolysis of the 11-membered cyclic binaphthyl aceta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7b27db9a4228343ad61b88aa62ee8b9
https://doi.org/10.1016/s0040-4039(00)00120-9
https://doi.org/10.1016/s0040-4039(00)00120-9
Publikováno v:
Synthesis. 2000:1677-1680
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2732b5d53c31bc5bc759794fad76a65e
https://doi.org/10.1055/s-2000-8197
https://doi.org/10.1055/s-2000-8197
Publikováno v:
Tetrahedron: Asymmetry. 10:4763-4768
Enantiopure 1,1′-binaphthyl-2,2′-dicarboxylic acids ( R )- 1 and ( S )- 1 have been synthesized through the lipase-catalyzed kinetic resolution of the racemic 2,2-bis(hydroxymethyl)-1,1′-binaphthyl (±)- 2 and subsequent oxidation of the hydrox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ada1fc1466b24e5e4e1232ab1bb2c5d7
https://doi.org/10.1016/s0957-4166(99)00555-8
https://doi.org/10.1016/s0957-4166(99)00555-8
Publikováno v:
Tetrahedron: Asymmetry. 10:2845-2851
Reaction of diazoacetamides with aromatic aldehydes in the presence of 20 mol% of chiral binaphthylsulfide and 10 mol% of copper(II) acetylacetonate gave chiral glycidic amides with up to 64% ee.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6da9835c57d05fed5c51f31933141cbe
https://doi.org/10.1016/s0957-4166(99)00289-x
https://doi.org/10.1016/s0957-4166(99)00289-x
Publikováno v:
Tetrahedron. 54:10657-10670
A short synthesis of the phytosphingosine derivatives and their stereoisomers by using asymmetric dihydroxylation of the optically active olefins derived from l -serine is described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2cf4023c6c957ab5f69c88531a96a27
https://doi.org/10.1016/s0040-4020(98)00615-2
https://doi.org/10.1016/s0040-4020(98)00615-2
Publikováno v:
The Journal of Organic Chemistry. 59:111-119
When (3-(ethoxycarbonyl)-2-ethoxy-2-propenylidene)triphenylphosphorane (6) was allowed to react with α-bromo ketones 8a-d in dichloromethane in the presence of Cs 2 CO 3 at room temperature, a [3+2] annulation occurred and led to the formation of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cb4d47197f0e400c2e386c031f5908b
https://doi.org/10.1021/jo00080a019
https://doi.org/10.1021/jo00080a019
Publikováno v:
ChemInform. 42
Organocatalyst-controlled asymmetric anti-Michael reactions of (tert-butyldimethylsilyloxy)acetaldehyde with a range of nitroolefins, followed by an intermolecular aza-Henry reaction with imine, provided iminosugar derivatives with five contiguous st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c4ab5aad29aaa39d549117b9229b842
https://doi.org/10.1002/chin.201111210
https://doi.org/10.1002/chin.201111210
Autor:
Tooru Kuroda, Ritsuo Imashiro
Publikováno v:
Tetrahedron Letters. 42:1313-1315
Methyl (2R,3S)-3-(4-methoxyphenyl) glycidate, a key intermediate of diltiazem, was synthesized in good yield with high enantioselectivity based on chiral oxazaborolidine-mediated Mukaiyama aldol reaction of p-anisaldehyde with α,α-dichloro silyl ke
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb30259abcc73b0fb1aec7ba8cd8dcef
https://doi.org/10.1016/s0040-4039(00)02235-8
https://doi.org/10.1016/s0040-4039(00)02235-8