Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Mitsuyo Horikawa"'
Publikováno v:
New Journal of Chemistry. 46:16256-16259
A base-induced isomerization of red uroleuconaphin A1 to yellow uroleuconaphin A2 having polycyclic acetal is described here.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6018b330a1531ddb9d4f9dc213f8d703
https://doi.org/10.1039/d2nj02676g
https://doi.org/10.1039/d2nj02676g
Autor:
Chiharu Ozakai, Kei Kitamura, Mitsuyo Horikawa, To-sho Hoshiyama, Akari Imamura, Tatsuro Yoneyama, Akemi Umeyama, Masaaki Noji, Tetsuto Tsunoda, Hiroto Kaku
Publikováno v:
New Journal of Chemistry. 46:2600-2604
A strong acid-promoted single-step transformation of red uroleuconaphin A1 to green viridaphins A1 and A2 is described here.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3037e1163a6d09d43f24a737888d7d1e
https://doi.org/10.1039/d1nj05261f
https://doi.org/10.1039/d1nj05261f
Autor:
Hiroto Kaku, Shinya Suzuki, Kei Kitamura, Makoto Inai, Mitsuyo Horikawa, Yuki Oguri, Tetsuto Tsunoda
Publikováno v:
Chemical and Pharmaceutical Bulletin. 68:380-383
The cryptolactones A1, A2, B1, and B2 isolated from a Cryptomyzus sp. aphid were synthesized via the Mukaiyama aldol reaction and olefin metathesis. Their antipodes and derivatives were also synthesized by the same strategy to investigate structure-a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f6943ed2666196e73016157f7aa8b2d
https://doi.org/10.1248/cpb.c19-01114
https://doi.org/10.1248/cpb.c19-01114
Autor:
Makoto, Inai, Yuki, Oguri, Mitsuyo, Horikawa, Hiroto, Kaku, Shinya, Suzuki, Kei, Kitamura, Tetsuto, Tsunoda
Publikováno v:
Chemicalpharmaceutical bulletin. 68(4)
The cryptolactones A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e90414552a31f6c933c65b24fc320dfa
https://pubmed.ncbi.nlm.nih.gov/32238655
https://pubmed.ncbi.nlm.nih.gov/32238655
Autor:
Takeshi Nishii, Yuki Takeuchi, Hiroto Kaku, Yuta Kawada, Mitsuyo Horikawa, Izumi Sakamoto, Takanori Naito, Kazuyoshi Makida, Tetsuto Tsunoda, Kazuya Iwaoka
Publikováno v:
Tetrahedron. 74:3052-3060
3,3-Dimethoxypropylsulfonyl (Dimps) chloride was prepared and used as a new versatile sulfonating agent for ammonia, primary and secondary amines to afford corresponding Dimps-amides in excellent yields. The resulting N-nonsubstituted and N-monosubst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c83b2967a2929ae1a35ead24e8cdfb35
https://doi.org/10.1016/j.tet.2018.04.088
https://doi.org/10.1016/j.tet.2018.04.088
Publikováno v:
Tetrahedron. 74:124-129
Racemic α-monosubstituted cyclopentanones were converted to optically active forms by a thermodynamically controlled deracemization using TADDOL-type host molecule 1 in alkaline aqueous MeOH. The efficiency of this conversion was strongly influenced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a5e156ff40c16c7e7e460222c6a52da
https://doi.org/10.1016/j.tet.2017.11.045
https://doi.org/10.1016/j.tet.2017.11.045
Publikováno v:
The Journal of antibiotics. 71(12)
Four red polyketide pigments, uroleuconaphins A1 (1) and B1 (2) and their glucosides 3 and 4, were isolated from the red goldenrod aphid Uroleucon nigrotuberculatum. Although these red pigments exist only as glucosides 3 and 4 in the intact insect bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8b3edeac3db378282c7e97fbd2c2b7b
https://pubmed.ncbi.nlm.nih.gov/30127422
https://pubmed.ncbi.nlm.nih.gov/30127422
Autor:
Hiroto Kaku, Yuhei Sonoda, Mitsuyo Horikawa, Hideyuki Hishida, Yuri Taniguchi, Kei Kitamura, Takumi Hamaguchi, Akiko Kubo, Makoto Inai, Tetsuto Tsunoda
Publikováno v:
HETEROCYCLES. 98:1525
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24918e17bfef0efba988d69d8fb6f850
https://doi.org/10.3987/com-19-14171
https://doi.org/10.3987/com-19-14171
Autor:
Shiho Mamba, Makoto Inai, Mitsuyo Horikawa, Takeshi Nishii, Risa Kondo, Takahiro Imai, Tetsuto Tsunoda, Yu Watanabe, Hiroto Kaku
Publikováno v:
European Journal of Organic Chemistry. 2013:8208-8213
Thermodynamically controlled deracemization of some acyclic ketones bearing a chiral center at the position α to the carbonyl group was satisfactorily achieved. Acyclic ketones with high optical purities could be isolated after treatment of the race
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b2c33d1c14bf787286ef6b7d7ba8f04
https://doi.org/10.1002/ejoc.201300936
https://doi.org/10.1002/ejoc.201300936
Autor:
Tetsuto Tsunoda, Masami Tanaka, Ayaka Sogabe, Takeshi Nishii, Taichi Nishimura, Hiroto Kaku, Makoto Inai, Shigeru Takahashi, Kouji Yamada, Mitsuyo Horikawa
Publikováno v:
Tetrahedron. 69:1808-1814
A novel yellowish pigment, xanthouroleuconaphin, was isolated from the aphid Uroleucon nigrotuberculatum. Its structure was established by detailed analyses of 1D and 2D NMR spectra and EI-HRMS. Furthermore, the total synthesis of (±)-xanthouroleuco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd98b643122aa09f59dee68b51d01f52
https://doi.org/10.1016/j.tet.2012.12.070
https://doi.org/10.1016/j.tet.2012.12.070