Search Results - "Suginome, H."

Benzolactams. 4. Reaction of 3‘,4‘- or 4‘,5‘-Dialkoxy-Substituted 1-(2‘-Bromobenzyl)-2-ethoxycarbonyl-1,2,3,4-tetrahydroisoquinolines with Alkyllithium. 1,2 and 1,4 Additions of Alkyllithium to Benzolactams by Orito, Kazuhiko, Miyazawa, Mamoru, Kanbayashi, Ryo, Tatsuzawa, Takashi, Tokuda, Masao, Suginome, Hiroshi

“…Treatment of 1-(2‘-bromo-3‘,4‘-dialkoxybenzyl)-1,2,3,4-tetrahydroisoquinoline carbamates, 1a,c, with excess alkyllithium gave 8-oxoberbines, 2a,c, which were…”
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Oxygen heterocycles. Maackiain, a new naturally occurring chromanocoumaran by Suginome, H.

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Dimerization of anilines and benzylamines with mercury(II) oxide-iodine reagent by Orito, Kazuhiko, Hatakeyama, Takahiro, Takeo, Mitsuhiro, Uchiito, Shiho, Tokuda, Masao, Suginome, Hiroshi

“…By treatment with mercury(II) oxide-iodine reagent in dichloromethane at room temperature, substituted anilines were transformed to the corresponding…”
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Novel and convenient method for the stereo- and regiospecific synthesis of conjugated alkadienes and alkenynes via the palladium-catalyzed cross-coupling reaction of 1-alkenylboranes with bromoalkenes and bromoalkynes by Miyaura, Norio, Yamada, Kinji, Suginome, Hiroshi, Suzuki, Akira

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Regioselective synthesis of β,γ-unsaturated acids by the electrochemical carboxylation of allylic bromides using a reactive-metal anode by Tokuda, Masao, Kabuki, Takashi, Katoh, Yoshitaka, Suginome, Hiroshi

“…Electrolysis of γ-mono and disubstituted allylic bromides in the presence of atmospheric pressure of carbon dioxide using a platinum cathode and a magnesium…”
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Tandem cyclization of N-allylaminyl radicals: Stereoselective synthesis of 1,2,5-trisubstituted pyrrolizidines by Senboku, Hisanori, Kajizuka, Yoshinori, Hasegawa, Hikaru, Fujita, Hirotake, Suginome, Hiroshi, Orito, Kazuhiko, Tokuda, Masao

“…Radical reaction of N-allylalk-4-enylaminyl radicals, generated from the corresponding N-chloroamines by treatment with Bu 3SnH-AIBN in refluxing toluene, was…”
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Photoinduced molecular transformations. 158. A total synthesis of (.+-.)-methyl piperitol: An unsymmetrically substituted 2,6-diaryl-3,7-dioxabicyclo[3.3.0]octane lignan by Orito, Kazuhiko, Sasaki, Takahiro, Suginome, Hiroshi

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Photoinduced molecular transformations. CIV: Pathways of the photorearrangements of five-membered cyclic steroidal α-nitro ketones to N-hydroxy cyclic imides, cyclic hydroxamic acid, and cyclic imide by SUGINOME, H, KUROKAWA, Y

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Studies on carboxylation of alkoxy-substituted benzyl alcohols via direct lithiation and bromine-lithium exchange: Synthesis of phthalides and phthalideisoquinoline alkaloids by Orito, Kazuhiko, Miyazawa, Mamoru, Suginome, Hiroshi

“…Conversion of alkoxy-substituted benzyl alcohols to the corresponding phthalides by carboxylation via ortho lithiation and bromine-lithium exchange was…”
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New one-step general synthesis of 2,3-dihydronaphtho[2,3-b]furan-4,9-diones by regioselective photoaddition of 2-hydroxy-1,4-naphthoquinones with various alkenes and its application to a two-step synthesis of maturinone by KOBAYASHI, K, SHIMIZU, H, SASAKI, A, SUGINOME, H

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Photoinduced molecular transformations. 128. Regioselective [2 + 2] photocycloaddition of 3-acetoxyquinolin-2(1H)-one with alkenes and formation of furo[2,3-c]quinolin-4(5H)-ones, 1-benzazocine-2,3-diones, and cyclopropa[d]benz[1]azepine-2,3-diones via a .beta.-scission of cyclobutanoxyl radicals generated from the resulting [2 + 2] photoadducts by Kobayashi, Kazuhiro, Suzuki, Masayoshi, Suginome, Hiroshi

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Photoinduced transformations. LXXVII: A four-step substitution of a carbonyl group of steroidal ketones by an oxygen atom. A new method for the synthesis of cyclic ethers by SUGINOME, H, YAMADA, S

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Photoinduced molecular transformations. CXL: New one-step general synthesis of naphtho[2,3-b]furan-4,9-diones and their 2,3-dihydro derivatives by the regioselective [3+2] photoaddition of 2-hydroxy-1,4-naphthoquinones with various alkynes and alkenes : application of the photoaddition to a two-step synthesis of maturinone by KOBAYASHI, K, SHIMIZU, H, SASAKI, A, SUGINOME, H

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Photoinduced transformations. LXXIII: Transformations of five- (and six-) membered cyclic alcohols into five- (and six-) membered cyclic ethers ― a new method of a two-step transformation of hydroxy steroids into oxasteroids by SUGINOME, H, YAMADA, S

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Transformation of epiandrosterone into 3-oxa-, 3-thia-, 3-selena-, and 3-aza-17-oxaandrostanes of the 5 alpha series based on beta-scission of alkoxyl radicals by Suginome, H, Wang, J B

“…3 beta-Hydroxy-5 alpha-androstan-17-one was transformed into 17-oxa-5 alpha-androstan-3 beta-ol in five steps involving conversion of the 17-ketone via the…”
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Photoinduced molecular transformations. CXXXXVII: [2+2] Photoaddition of protected 4-hydroxy-1(2H)-isoquinolinone with an electron-deficient alkene and the formation of a 3,6-epoxy-3,4,5,6-tetrahydro-2-benzazocin-1(2H)-one via a β-scission of cyclobutanoxyl radicals generated from the resulting photoadduct by SUGINOME, H, KAJIZUKA, Y, SUZUKI, M, SENBOKU, H, KOBAYASHI, K

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Regioselectivity in electrochemical allylation of carbonyl compounds. A synthesis of egomaketone by regioselective allylation by Tokuda, Masao, Satoh, Shohei, Suginome, Hiroshi

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New Anionic Cyclization of 4- and 5-Alkynylamines: Synthesis of 2-Benzylidene Pyrrolidines and Piperidines by Tokuda, Masao, Fujita, Hirotake, Nitta, Makoto, Suginome, Hiroshi

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Photoinduced molecular transformations. CX, Formation of furoquinolinones via β-scission of cyclobutanoxyl radicals generated from [2+2] photoadducts of 4-hydroxy-2-quinolone and acyclic and cyclic alkenes. X-ray crystal structure of (6aα,6bβ,10aβ,10bα)-(±)-10b-acetoxy-6a,6b,7,8,9,10,10a,10b-octahydro-5-methylbenzo[3,4]cyclobuta[1,2-c]quinolin-6(5H)-one by SUGINOME, H, KOBAYASHI, K, ITOH, K, SEKO, S, FURUSAKI, A

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Photoinduced molecular transformations. CVII, A versatile substitution of a carbonyl group of steroidal ketones by a heteroatom. The synthesis of aza-, oxa-, thia-, selena-, and tellurasteroids by SUGINOME, H, YAMADA, S, JIAN BO WANG

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