Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Hiroto Nagaoka"'
Publikováno v:
Tetrahedron Letters. 56:5941-5944
Novel pyridinium dichromate (PDC) catalyzed oxidative rearrangement for the conversion of tertiary allylic alcohols to s-substituted enones is described. Using a catalytic amount of PDC with PhI(OAc) 2 as a co-oxidant in the presence of magnesium sul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a88aec97b1f587cc56d17d86f9fe2850
https://doi.org/10.1016/j.tetlet.2015.09.046
https://doi.org/10.1016/j.tetlet.2015.09.046
Autor:
Hiroshi Kogen, Shinya Watanabe, Kokoro Nagasawa, Atsushi Kishida, Kenta Tendo, Kazuma Matsunaga, Kazuhiko Takatori, Hiroto Nagaoka, Shoya Ota
Publikováno v:
Organic letters. 19(14)
Direct conversion of methylenebicyclo[4.2.0]octanone to methylenebicyclo[3.2.1]octanol by a Sm(II)-induced 1,2-rearrangement with ring expansion of the methylenecyclobutane is described. Three conditions were optimized to allow the adaptation of this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::274546f3370b5d6b14d6342f2010376e
https://pubmed.ncbi.nlm.nih.gov/28661153
https://pubmed.ncbi.nlm.nih.gov/28661153
Publikováno v:
ChemInform. 47
Novel pyridinium dichromate (PDC) catalyzed oxidative rearrangement for the conversion of tertiary allylic alcohols to s-substituted enones is described. Using a catalytic amount of PDC with PhI(OAc) 2 as a co-oxidant in the presence of magnesium sul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05a80dea0e8b1c3e54514780f9c3fbbc
https://doi.org/10.1002/chin.201615042
https://doi.org/10.1002/chin.201615042
Autor:
Atsushi Kishida, Hiroto Nagaoka
Publikováno v:
Tetrahedron Letters. 49:6393-6397
Cascade reaction involving reductive cyclization, Dieckmann condensation, and lactonization of E- and Z-dimethyl 2-methyl-8-oxoundec-2-enedioates and Z-dimethyl 2-methyl-7-oxodec-2-enedioate with samarium(II) iodide was found to stereospecifically pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::173fc9e4e5726cdcb8fa5d3f4c5d4197
https://doi.org/10.1016/j.tetlet.2008.08.105
https://doi.org/10.1016/j.tetlet.2008.08.105
Publikováno v:
Journal of Synthetic Organic Chemistry, Japan. 65:665-676
Reactive free radicals have wide applications in organic synthesis due to their remarkable chemical properties that allow useful molecular transformations. The present review covers the author's recent studies on the utilization of radical species in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2a0526d6e492bb87ef7a054d48bab96
https://doi.org/10.5059/yukigoseikyokaishi.65.665
https://doi.org/10.5059/yukigoseikyokaishi.65.665
Autor:
Ikuo Shinohara, Hiroto Nagaoka
Publikováno v:
Tetrahedron Letters. 45:1495-1498
Novel ring-expansion reaction of 1,2-cyclobutanedicarboxylates with Sm(II) in the presence of HMPA with a catalytic amount of methanol was found to provide 2-oxocyclopentanecarboxylates.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::685c2c69f8932aa53c8b9ee8b6bb7340
https://doi.org/10.1016/j.tetlet.2003.12.047
https://doi.org/10.1016/j.tetlet.2003.12.047
Publikováno v:
Tetrahedron Letters. 43:8587-8590
Atom-transfer radical annulation of diene derived from d -glucose under Kharasch conditions provided access to the fully functionalized CD ring system of paclitaxel.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14e3e8d1f04d8e74a8ca56f8cfff6398
https://doi.org/10.1016/s0040-4039(02)02058-0
https://doi.org/10.1016/s0040-4039(02)02058-0
Publikováno v:
Synlett. 2002:0227-0230
An efficient method was established for the synthesis of the optically active bicyclo[4.2.1]nonane segment of mediterraneols using diastereoselective sequential Michael reaction and then retro-aldol reaction.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f79372bb6e5352d5162a88fe0a79f065
https://doi.org/10.1055/s-2002-19778
https://doi.org/10.1055/s-2002-19778
Publikováno v:
Tetrahedron Letters. 41:5923-5926
A new route to the synthesis of an optically active illudane skeleton from ( R )-(−)-pantolactone ( 4 ) is established. The tricyclic ring system was constructed by Michael–Michael-elimination reaction of the enolate of (3 S ,5 R )-3-( tert -buty
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2056d9eaad7f4cd86f98af0324f80174
https://doi.org/10.1016/s0040-4039(00)00974-6
https://doi.org/10.1016/s0040-4039(00)00974-6
Publikováno v:
Tetrahedron Letters. 40:5215-5218
Two complementary methods for the construction of the ring system of CP-263,114 ( 1 ), one relying on the Grob fragmentation reaction and the other on a sequential photolytic alkoxy radical fragmentation-reduction, are described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d9c0f01b56f4165a2931282f0cc0c31
https://doi.org/10.1016/s0040-4039(99)00941-7
https://doi.org/10.1016/s0040-4039(99)00941-7