Zobrazeno 1 - 10
of 220
pro vyhledávání: '"Hisashi Uda"'
Publikováno v:
Tetrahedron Letters. 38:6861-6864
Highly enantioselective protonation of prochiral lithium enolates is disclosed. The present method employed ( S,R s )-CF 3 -hydroxy sulfoxide (3b) as the chiral protonating agent, and the protonation of lithium enolates of cyclohexanone derivatives w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c00454b8c6fa4d1e2e7e25d7e2d678c8
https://doi.org/10.1016/s0040-4039(97)01618-3
https://doi.org/10.1016/s0040-4039(97)01618-3
Publikováno v:
Tetrahedron. 51:9891-9898
Enolate of Wieland-Miescher ketone 1 has reacted with methyl acrylate to give methyl (1S*,2S*,4R*,6S*)-6-methyltricyclo[6.2.2.0 1,6]-dodecan-7, 12-dion-2-carboxylate 5 whose structure has been determined by X-ray crystallography after transformation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afd79c56ca7516918283a2d2872c1cbf
https://doi.org/10.1016/0040-4020(95)00566-q
https://doi.org/10.1016/0040-4020(95)00566-q
Publikováno v:
The Journal of Organic Chemistry. 59:6606-6613
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c870d60653c0a950f07f00b88206f52d
https://doi.org/10.1021/jo00101a019
https://doi.org/10.1021/jo00101a019
Publikováno v:
Tetrahedron Letters. 35:8189-8192
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb8fdadba6b6bad0d5b7024ad0eee675
https://doi.org/10.1016/0040-4039(94)88279-7
https://doi.org/10.1016/0040-4039(94)88279-7
Publikováno v:
Tetrahedron: Asymmetry. 5:1139-1142
An efficient preparative method for the enantiomerically pure juvenile hormone II has been developed by applying the diastereoselective alkylation and carbonyl reduction of an optically pure β-keto sulfoxide as the key steps.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44fa8afbfc13b29672af19dd991fe507
https://doi.org/10.1016/0957-4166(94)80140-1
https://doi.org/10.1016/0957-4166(94)80140-1
Publikováno v:
Tetrahedron: Asymmetry. 4:1755-1758
(1S,2R,4R)-(−)-2,10-Camphorsultam is a very useful chiral probe for optical resolution by HPLC and X-ray crystallographic determination of the absolute stereochemistry of carboxylic acids. The absolute configurations of 2,6-dimethylspiro[3.3]heptan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fd9ba3f3f01ac7155b41cf54d944e96
https://doi.org/10.1016/s0957-4166(00)80409-7
https://doi.org/10.1016/s0957-4166(00)80409-7
Publikováno v:
Tetrahedron: Asymmetry. 4:1409-1412
Enantiomerically pure β,β-disubstituted vinyl sulfoxides undergo cycloaddition with dichloroketene to give β,β-disubstituted γ-lactones which are transformed into synthetically important 44-disubstituted cyclohex-2-enones in optically pure form.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::168313b57ad1dc5917ec2ced3d5b94cc
https://doi.org/10.1016/s0957-4166(00)80327-4
https://doi.org/10.1016/s0957-4166(00)80327-4
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2173-2184
Reaction of the kinetic enolates or the trimethylsilyl enol ethers of 1-acetylcyclohexenes with α,β-unsaturated carbonyl compounds affords 4-substituted 1 -decalone derivatives under basic or Lewis acidic conditions. The reaction with acrylates of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d61d122179fa883780fbda9ef488e485
https://doi.org/10.1039/p19930002173
https://doi.org/10.1039/p19930002173
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2651-2655
Reactions of the kinetic enolates 6 of 1-acetylcyclohexenes 5 with α-bromo α,β-unsaturated esters 7 proceed via a successive Michael–Michael-substitution pathway to give methyl 2-oxotricyclo[4.4.0.01,5]decane-5-carboxylates 8 in a one-pot operat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c23ae19e5792286eb900e4df6ed0cae
https://doi.org/10.1039/p19930002651
https://doi.org/10.1039/p19930002651
Publikováno v:
ChemInform. 22
A new synthesis of 3(2H)-furanones from 4-hydroxy-2-alkyn-1-one derivatives via CO2 mediated bond reorganization has been developed to the preparation of an antitumor agent, geiparvarin and a constituent of flavors, 2,5-dimethyl-3(2H)-furanone.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f41e2e3b205beab2a174d2fc372ed9c2
https://doi.org/10.1002/chin.199115180
https://doi.org/10.1002/chin.199115180