Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Kei Maekawa"'
Autor:
Kei Maekawa, Aiichiro Nagaki, Kiyoshi Matsuyama, Masahiro Takumi, Hongzhi Bai, Chiemi Fujita, Yosuke Ashikari, Riichi Miyamoto, Noriyuki Tomiyasu
Publikováno v:
Catalysis Today. :231-236
We describe a novel strategy to increase the unit-time-productivity of flow synthesis by using hierarchical bimodal porous silica gel (HBPSG) supported palladium column reactors. Because HBPSG has a significantly large surface area, the column reacto
Autor:
Kiyoshi Matsuyama, Kiyonari Shiosaki, Yosuke Ashikari, Chiemi Fujita, Hongzhi Bai, Aiichiro Nagaki, Mai Ishibashi, Kei Maekawa
Publikováno v:
Green Processing and Synthesis, Vol 10, Iss 1, Pp 722-728 (2021)
Owing to their recyclability, heterogeneous transition metal catalysts represent a means of conserving depletable resources for the synthesis of pharmaceutical, agricultural, and functional chemicals. We recently developed a novel heterogeneous palla
Autor:
Hodaka Sakaue, Yosuke Ashikari, Susumu Ishikawa, Yoko Aizawa, Ibuki Shite, Masahiro Takumi, Yutaka Shimizu, Renzo Luisi, Yuya Yonekura, Ryosuke Higuma, Marco Colella, Kei Maekawa, Toshihiro Takegawa, Chiemi Fujita, Yiyuan Jiang, Yusuke Takahashi, Aiichiro Nagaki, Hiroki Yamashita
Publikováno v:
European Journal of Organic Chemistry. 2020:618-622
Publikováno v:
The Proceedings of Conference of Kansai Branch. :6-25
Publikováno v:
Tetrahedron. 63:11267-11281
The alkyl, aryl, and acyl substituent effects on the photoinduced electron transfer-initiated cyclization reaction of the title compounds (1) were investigated in polar solvents from mechanistic and synthetic points of view. The irradiation of (Z)-1
Autor:
Taisuke Matsumoto, Kei Maekawa, Tetsutaro Igarashi, Kanji Kubo, Haruo Watanabe, Tadamitsu Sakurai, Yuji Sasaki
Publikováno v:
Tetrahedron Letters. 48:4765-4770
The irradiation of the title compounds [( Z )- 1 ] having ( S )-(+)- sec -butyl, (−)-mentyl and related chiral auxiliaries in methanol and 1,2-dichloroethane containing 2-(diethylamino)ethanol afforded chiral auxiliary-substituted (4 S ,5 S )-, (4
Publikováno v:
Tetrahedron. 61:11211-11224
Photoinduced electron transfer reactions of the title N-acyl-α-dehydronaphthylalaninamides [ (Z)-1 ] with (S)-1-phenylethylamino and (S)-alaninamide auxiliary groups in methanol containing a tertiary amine were shown to form (R,S)- and (S,S)-3,4-dih
Publikováno v:
Tetrahedron. 60:10293-10304
The irradiation of substituted (Z)-N-aroyl-α-dehydronaphthylalaninamides [ (Z)-1 ] in methanol containing triethylamine (TEA) with Pyrex-filtered light was found to give 3,4-dihydrobenzoquinolinone derivatives ( 2 ) in high yields along with minor a
Publikováno v:
Tetrahedron. 60:9517-9524
It was found that the reaction of the title compounds [ (Z)-1 ] with oxygen in methanol proceeds according to the first-order kinetics to give (Z)-2-imidazolin-5-one derivatives and hydrogen peroxide in quantitative yields. Analysis of substituent an
Publikováno v:
Tetrahedron Letters. 45:3663-3667
The irradiation of N-(4-substituted benzoyl)-α-dehydroarylalanine alkyl esters (1) in methanol containing triethylamine (TEA) was found to quantitatively give cis- and trans-4,5-dihydrooxazole derivatives (2), which were described as being formed vi