Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Naoto Utsumi"'
Publikováno v:
Organic Letters. 10:3405-3408
Direct organocatalytic Mannich-type reactions of thioesters provide for the expedient and diastereoselective synthesis of protected beta-amino acids. A variety of thioesters were found to be reactive with different imines under mild conditions to pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0644ede26b27d57c80c111c934bbbc55
https://doi.org/10.1021/ol801207x
https://doi.org/10.1021/ol801207x
Publikováno v:
Angewandte Chemie. 120:4664-4667
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea1c263c9942d3ee95a188b27bd0e703
https://doi.org/10.1002/ange.200801088
https://doi.org/10.1002/ange.200801088
Autor:
Carlos F. Barbas, Naoto Utsumi, Fujie Tanaka, Haile Zhang, Paul Ha-Yeon Cheong, Klaus Albertshofer, Susumu Mitsumori, Maria Mifsud, Masanori Imai, Kendall N. Houk, Noemi Garcia-Delgado
Publikováno v:
Journal of the American Chemical Society. 130:875-886
The development of enantioselective anti-selective Mannich-type reactions of aldehydes and ketones with imines catalyzed by 3-pyrrolidinecarboxylic acid and related pyrrolidine derivatives is reported in detail. Both (3R,5R)-5-methyl-3-pyrrolidinecar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b3a0a4c219aa376d4c2bd429f6012a6
https://doi.org/10.1021/ja074907+
https://doi.org/10.1021/ja074907+
Publikováno v:
Organic Letters. 9:3445-3448
A practical organocatalytic strategy designed to mimic the l-rhamnulose 1-phosphate and D-fructose 1,6-diphosphate aldolases has been developed and shown to be effective in the preparation of carbohydrates and polyol derivatives. Threonine-based cata
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd1eb5b308f5ad1ee9d701d409526a6d
https://doi.org/10.1021/ol701467s
https://doi.org/10.1021/ol701467s
Autor:
Shunji Araki, Yoshito Tobe, Keiji Hirose, Naoto Utsumi, Kiyomi Adachi, Koichiro Naemura, Atsushi Nagano, Kazuya Kawabata, Motohiro Sonoda
Publikováno v:
Journal of the American Chemical Society. 124:5350-5364
m-Diethynylbenzene macrocycles (DBMs), buta-1,3-diyne-bridged [4(n)]metacyclophanes, have been synthesized and their self-association behaviors in solution were investigated. Cyclic tetramers, hexamers, and octamers of DBMs having exo-annular octyl,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e06bc8c6409d73ac196bffc49c4ce74c
https://doi.org/10.1021/ja012458m
https://doi.org/10.1021/ja012458m
Publikováno v:
Tetrahedron. 57:8075-8083
Butadiyne-bridged [4 4 ]- and [4 8 ]metacyclophanes having exo -annular t -butyl groups were prepared by intermolecular Eglinton coupling of the dimeric unit or by intramolecular ring closure of the linear tetramer. Comparison of the 1 H and 13 C NMR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::937b56f1aac0ba9a3e7ed63f3ab5efdf
https://doi.org/10.1016/s0040-4020(01)00779-7
https://doi.org/10.1016/s0040-4020(01)00779-7
Publikováno v:
Tetrahedron Letters. 50:145-147
N -Tosylimidates acted as nucleophiles in highly enantioselective organocatalytic Michael addition reactions to α,β-unsaturated aldehydes in the presence of a catalytic amount of trialkylsilyl-protected diarylprolinol. In particular, α-phenyl-subs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d33984ef5eeb3ecdacb0f87cdf136c84
https://doi.org/10.1016/j.tetlet.2008.10.126
https://doi.org/10.1016/j.tetlet.2008.10.126
Publikováno v:
Tetrahedron Letters. 37:9325-9328
We synthesized diethynylbenzene macrocycles (DBMs), cyclic oligomers of diethynylbenzene, having functional groups in the periphery of the macrocyclic framework and investigated their self-association properties in solution resulting from π-π stack
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1516cba37f8eb7c3b2ad2dc92b9a33e4
https://doi.org/10.1016/s0040-4039(97)82954-1
https://doi.org/10.1016/s0040-4039(97)82954-1
Autor:
Kazuya Kobiro, Hideaki Ishii, Naoto Utsumi, Yoshito Tobe, Takuji Kusumoto, Koichiro Naemura, Kiyomi Kakiuchi, Shinji Saiki
Publikováno v:
Journal of the American Chemical Society. 118:9488-9497
[6](9,10)Anthracenophane (1a) was synthesized by the benzoannelation method starting from dibromo[6]paracyclophane 6 via diepoxyanthracenophanes 3a and 4a. In a similar fashion, peri-substituted de...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78e099a1dc45ced2b3e4d79b7d201857
https://doi.org/10.1021/ja961562e
https://doi.org/10.1021/ja961562e
Publikováno v:
ChemInform. 26
Extremely air- and acid-sensitive [6](9,10)anthracenophane (1), the smallest-9,10-bridged anthracene, has been synthesized by reductive deoxygenation of diepoxyanthracenophane (4) with a low-valent titanium reagent, and it was characterized by its NM
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7eeb24faed54e5a0478ab194ba7322a
https://doi.org/10.1002/chin.199514128
https://doi.org/10.1002/chin.199514128