Zobrazeno 1 - 10
of 279
pro vyhledávání: '"Akio Murai"'
Autor:
Natsumi Kawamura, Kenshu Fujiwara, Takanori Suzuki, Akiyoshi Goto, Daisuke Domon, Ryo Katoono, Akio Murai, Keisuke Nogoshi, Uichi Akiba, Yoshihiko Kondo, Yoshitaka Nomura, Hideki Tanaka, Hidetoshi Kawai, Takuto Sato, Daisuke Sato
Publikováno v:
Tetrahedron. 73:703-726
The synthesis of the ABCDEF-ring of ciguatoxin 3C was achieved via a route that included anion coupling of a dimethyldithioacetal mono-S-oxide derivative corresponding to the AB-ring and an aldehyde corresponding to the EF-ring, followed by cyclizati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47e7ee02e486419e347cf9a1e71dc8f1
https://doi.org/10.1016/j.tet.2016.12.041
https://doi.org/10.1016/j.tet.2016.12.041
Autor:
Yu ichi Aki, Fuyuki Yamamoto, Hidetoshi Kawai, Hajime Matsue, Ryo Katoono, Yuki Suzuki, Mariko Kawamura, Akio Murai, Nao Koseki, Kenshu Fujiwara, Yuta Kikuchi, Shun Ichi Murata, Takanori Suzuki, Toshio Norikura
Publikováno v:
Angewandte Chemie International Edition. 53:780-784
Pectenotoxin-2 (PTX2) is a shellfish toxin and has a non-anomeric spiroacetal, which is not stabilized by an anomeric effect. The selective construction of the non-anomeric spiroacetal has been a major problem in the synthesis of PTX2. Described here
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4cfcee2bb49f7c18b0b3b214c78c5129
https://doi.org/10.1002/anie.201308502
https://doi.org/10.1002/anie.201308502
Publikováno v:
Journal of the Japanese Society of Snow and Ice. 74:3-21
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be91460a7ea8c452db84dc582976f225
https://doi.org/10.5331/seppyo.74.1_3
https://doi.org/10.5331/seppyo.74.1_3
Autor:
Nao Koseki, Kenshu Fujiwara, Akio Murai, Hidetoshi Kawai, Yuki Suzuki, Shun Ichi Murata, Takanori Suzuki
Publikováno v:
Tetrahedron Letters. 52:5589-5592
The C8–C20 segment of pectenotoxin-2 was efficiently synthesized in 16% overall yield in 22 steps from l -malic acid via an improved route.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d28e19ba8895b683cb30621272223c55
https://doi.org/10.1016/j.tetlet.2011.08.051
https://doi.org/10.1016/j.tetlet.2011.08.051
Autor:
Mariko Kawamura, Azusa Okano, Akio Murai, Takanori Suzuki, Yu ichi Aki, Daisuke Awakura, Fuyuki Yamamoto, Hidetoshi Kawai, Shunsuke Shiga, Kenshu Fujiwara, Masanori Kobayashi
Publikováno v:
Tetrahedron Letters. 48:4523-4527
In this study, we synthesized the C8–C20 and C21–C30 segments of the diarrhetic shellfish toxin pectenotoxin 2. The C8–C20 segment was assembled from a phosphonate corresponding to the C8–C15 segment (prepared from l -malic acid in 19 steps)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4e97cb5c8cd696e0a7d43d65853caf0
https://doi.org/10.1016/j.tetlet.2007.04.136
https://doi.org/10.1016/j.tetlet.2007.04.136
Publikováno v:
Tetrahedron. 62:7408-7435
Convergent synthesis of the common FGHI-ring part (54) of ciguatoxins was achieved via the following key steps: (i) the Nozaki–Hiyama–Kishi reaction connecting the F-ring part (6) with the I-ring part (7); (ii) regio- and stereoselective epoxidat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cafe56bc6fea7bcf0f4592ac9ad0de06
https://doi.org/10.1016/j.tet.2006.05.014
https://doi.org/10.1016/j.tet.2006.05.014
Publikováno v:
Tetrahedron Letters. 47:747-751
The common FGHI-ring part ( 2 ) of ciguatoxins has been synthesized from the F- and I-ring parts ( 6 and 5 , respectively). The Nozaki–Hiyama–Kishi coupling of 6 with 5 followed by regio- and stereoselective epoxidation at C29 and C30 afforded an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5aa60cf20a87d89a9185e3fd0639d06a
https://doi.org/10.1016/j.tetlet.2005.11.085
https://doi.org/10.1016/j.tetlet.2005.11.085
Publikováno v:
Tetrahedron Letters. 46:8285-8288
Convergent synthesis of the IJKLM-ring part ( 2 ) of ciguatoxin CTX3C has been achieved from the I-ring and the L-ring parts ( 4 and 5 ) in total eight steps in 27% overall yield. The carbanion derived from 4 , stabilized by a dimethyldithioacetal S-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::140aaa4e3cb8d83b738f5aa955d7fe6b
https://doi.org/10.1016/j.tetlet.2005.09.164
https://doi.org/10.1016/j.tetlet.2005.09.164
Autor:
Ken Shimawaki, Hidetoshi Kawai, Takanori Suzuki, Atsushi Takemura, Akio Murai, Kenshu Fujiwara
Publikováno v:
Tetrahedron. 61:7392-7419
Aiming at a convergent total synthesis of ciguatoxin CTX1B, its EF-ring segment has been synthesized. During the synthesis, a novel method for the construction of branched ethers, based on regioselective reduction of γ-alkoxy β,γ-unsaturated α-si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::845d2ca8a713cdf1dded51e263fe9491
https://doi.org/10.1016/j.tet.2005.05.073
https://doi.org/10.1016/j.tet.2005.05.073
Autor:
Akio Murai
Publikováno v:
Journal of the Japanese Society of Snow and Ice. 67:341-351
ペルチェ効果を利用して雪結晶を生成する装置を考案した.本装置は,大型のペルチェ素子を多段化し水冷方式で使用する事により,室内で-30℃程度までの低温環境を実現しながら,電圧を調
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1380e670a49af9d65d76f42142458fca
https://doi.org/10.5331/seppyo.67.341
https://doi.org/10.5331/seppyo.67.341