Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Mitsuhiro Okimoto"'
Publikováno v:
Tetrahedron. 71:1705-1711
Transfer of aryl group from boron to tin can be achieved by simple treatment of arylboronic acids with tributyltin methoxide at 100 °C for 1 h under neat conditions. The resulting aryltributylstannanes are applicable to one-pot synthesis of diaryl k
Publikováno v:
Tetrahedron Letters. 55:1299-1302
A wide range of dimethyl 2-(5-aryl-5-oxopentyl)malonates was electrooxidized in methanol, in the presence of catalytic amount of potassium iodide, to give the corresponding dimethyl 2-aroylcyclopentane-1,1-dicarboxylates in high yields. The reactions
Publikováno v:
RSC Advances. 4:2124-2128
1-Arylmethyl-4-[(E)-alk-1-enyl]-1H-1,2,3-triazoles have been synthesized from terminal conjugated (E)-enynes, prepared by copper-mediated cross-coupling reaction of (E)-alk-1-enyldisiamylboranes with (trimethylsilyl)ethynyl bromide, benzyl bromides a
Autor:
Shinnosuke Nishikawa, Haruki Yamamori, Takashi Yoshida, Kousuke Ohashi, Masayuki Hoshi, Mitsuhiro Okimoto
Publikováno v:
Synthetic Communications. 43:1766-1771
Several ketone N-phenylsemicarbazones were electrooxidized in the presence of potassium iodide and a base using methanol as the solvent to give nearly commensurate amounts of methyl N-phenylcarbamate and the corresponding dimethyl acetals. Continuous
Autor:
Shinnosuke Nishikawa, Takashi Yoshida, Kousuke Ohashi, Mitsuhiro Okimoto, Haruki Yamamori, Masayuki Hoshi
Publikováno v:
Synlett. 23:2544-2548
A range of 1,7-diarylheptane-1,7-diones were electrooxidized in the presence of iodide ions and a base in a mixture of methanol and toluene as the reaction solvents to give the corresponding cyclized 1,2-diaroylcyclopentanes in moderate to good yie
Autor:
Mitsuhiro Okimoto, Takashi Yoshida, Kousuke Ohashi, Haruki Yamamori, Shinnosuke Nishikawa, Masayuki Hoshi
Publikováno v:
Synthesis. 44:1315-1322
Several novel 2-aryl-1,3-oxazinane and 2-aryl-1,3-oxazolidine derivatives were synthesized from N-benzyl-2-piperidineethanols and N-benzyl-2-piperidinemethanols, respectively, by using electrooxidative methods in methanol. For these reactions, the yi
Publikováno v:
Synthesis. 2011:3839-3847
Conjugated dienediynes and enediynes with definite geometry- have been prepared in a one-pot manner. This protocol involves two types of coupling reaction, a Suzuki-type coupling and either a Hay coupling or a Cadiot-Chodkiewicz coupling. Thus, the c
Publikováno v:
Synthetic Communications. 41:3134-3139
Various biaryl methanols were electrooxidized into the corresponding biaryl ketones in good yields and under very mild reaction conditions. Because of the relatively high oxidation potential, bulky structure, and somewhat poor solubility, biaryl meth
Publikováno v:
Synlett. (16):2461-2464
(Trimethylsilyl)ethynyl bromide can be easily transformed into conjugated (E)-enynones, whose skeleton consists of consecutive carbonyl, ethynyl, and (E)-ethenyl units, via a one-pot multicomponent Suzuki-type reaction-Sonogashira reaction sequence.
Autor:
Tsutomu Suzuki, Kyoko Suzuki, Mitsuhiro Okimoto, Masashi Fujiwara, Yuichi Shimizu, Yukio Takahashi, Tetsuo Yamada, Noriyasu Okazaki
Publikováno v:
Journal of Wood Science. 55:60-68
The yields and properties of oil and gas fractions coproduced during carbonization of larch wood loaded with Ni 2%, Ni 2%+Ca 1%, and Ni 4% and without catalyst (None) at 700°–900°C were examined to clarify the catalytic effect in terms of convers