Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Rui Umeda"'
Cesium Carbonate-Catalyzed α-Phenylchalcogenation of Carbonyl Compounds with Diphenyl Dichalcogenide
Publikováno v:
Molecules, Vol 14, Iss 9, Pp 3367-3375 (2009)
It was found that cesium carbonate has a unique catalytic ability on the reaction of carbonyl compounds with diphenyl diselenide to give the corresponding α-phenylseleno carbonyl compounds in moderate to good yields. Similarly, the α-phenylthiolati
Externí odkaz:
https://doaj.org/article/0d378ee301df4a30beb2f6a5b5253252
Publikováno v:
Synlett. 34:188-192
The reaction of 2-(alkynyl)benzaldehydes with alcohols in the presence of copper catalyst resulted in the selective synthesis of the 1,2-dihydronaphthalene derivatives. On the reaction, it was proposed that the reaction proceeds via the intramolecula
Publikováno v:
Tetrahedron Letters. 119:154412
Publikováno v:
SSRN Electronic Journal.
Autor:
Yutaka Nishiyama, Shuichi Suzuki, Yuji Shimizu, Yuta Ida, Rui Umeda, Takeshi Naota, Masahiro Ikeshita
Publikováno v:
Tetrahedron Letters. 60:183-186
π-Extended oxepins 1 and dimer 8 were synthesized by the benzannulation of the corresponding asymmetric diarylacetylene derivatives and 2-(phenylethynyl)benzaldehyde followed by the Cu-catalyzed intramolecular cyclization. The optical properties of
Publikováno v:
Tetrahedron Letters. 99:153839
Publikováno v:
Journal of Organometallic Chemistry. 877:92-101
When benzylic and allylic alcohols were treated with enol acetate in the presence of a catalytic amount of a rhenium complex, ReBr(CO)5, the carbon-carbon bond formation of the alcohols and enol acetate smoothly proceeded to give the corresponding ke
Publikováno v:
Tetrahedron Letters. 59:1121-1124
The coupling reactions of allylic and benzylic alcohols and allyltrimethylsilane are efficiently catalyzed by a rhenium complex to give the corresponding 1,5-dienes and alkenes in moderate to good yields. Similarly, alcohols were coupled with ketene
Autor:
Takeshi Naota, Ryo Ueda, Akitsugu Hayashi, Shuichi Suzuki, Masahiro Ikeshita, Taiki Tanaka, Rui Umeda, Yutaka Nishiyama
Publikováno v:
Tetrahedron. 86:132028
Publikováno v:
Chemistry Letters. 47:753-755
A synthetic method for 1,2-dihydroisoquinolines via the 6-endo-dig cyclization of 2-alkynylaldimines and nucleophilic addition has been developed. When the 2-alkynylaldimines were reacted with various nucleophiles such as nitromethane, dimethyl malon