Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Norio Takamura"'
Publikováno v:
Tetrahedron. 69:4325-4330
Hydrazones obtained from α-diazo esters were converted to pyrroles when heated with thionyl chloride in alcohol. Among hydrazones, those substituted with a benzene ring on the β-carbon to the ester are likely to give pyrroles in good yields.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d3d3f911d7eac2182b39a7d6caa6029
https://doi.org/10.1016/j.tet.2013.03.037
https://doi.org/10.1016/j.tet.2013.03.037
Publikováno v:
Tetrahedron Letters. 50:4762-4765
We have developed a novel method for the synthesis of 3,4-diarylpyrrole-2,5-dicarboxylates via α-diazo esters, which are easily obtained from phenylalanine derivatives. Utilizing this method, intermediates of bioactive compounds having the structure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e500006995f11b02f86e3770223be310
https://doi.org/10.1016/j.tetlet.2009.06.012
https://doi.org/10.1016/j.tetlet.2009.06.012
Publikováno v:
Tetrahedron. 65:461-468
Aryl hydrazones, the precursor of Fischer indole synthesis, were easily obtained by nucleophilic addition of aryllithium reagents to diazo esters. The aryl hydrazones were converted into indoles in good yields by heating with thionyl chloride in alco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9fd7ebeddfcecb2d9747b1c379918cc
https://doi.org/10.1016/j.tet.2008.11.028
https://doi.org/10.1016/j.tet.2008.11.028
Publikováno v:
Biomedical Chromatography. 20:576-584
To find the pairs of fluorogenic reagents having similar retention times in HPLC but with different fluorescent characteristics, six fluorogenic reagents bearing benzoxadiazole or benzoselenadiazole skeletons were synthesized. The resultant derivativ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e48fedc2d2185c90ac9cb0ad4027ef28
https://doi.org/10.1002/bmc.681
https://doi.org/10.1002/bmc.681
Publikováno v:
Tetrahedron Letters. 47:743-746
A novel method for synthesizing arylhydrazones, the precursor for Fischer indole synthesis, using aryllithium reagents and α-diazo esters that are easily obtained from α-amino acid esters, is described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1edb8214726dd801dfb8364c4b915e1b
https://doi.org/10.1016/j.tetlet.2005.11.126
https://doi.org/10.1016/j.tetlet.2005.11.126
Publikováno v:
Chemical and Pharmaceutical Bulletin. 55:1652-1654
Versatile electrophiles N-acylhydrazones are synthesized via diazotization, reduction, and acylation of alpha-amino acid esters. Reduction of diazo esters with L-selectride or tributylphosphine affords the corresponding hydrazones in good yields. Bot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dba46f196925c6cc574830ba40c16eb
https://doi.org/10.1248/cpb.55.1652
https://doi.org/10.1248/cpb.55.1652
Publikováno v:
The Journal of Organic Chemistry. 62:4343-4348
In order to establish the stereoselective synthesis of retinoic acids, which are ligand molecules of the retinoic acid receptors (RARs, all-E-isomer) and the retinoid X receptors (RXRs, 9Z-isomer), the reaction of β-ionone−tricarbonyliron complex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c040d754af2fa01adebed591e3ea4230
https://doi.org/10.1021/jo961041+
https://doi.org/10.1021/jo961041+
Publikováno v:
ChemInform. 44
Hydrazones obtained from α-diazo esters were converted to pyrroles when heated with thionyl chloride in alcohol. Among hydrazones, those substituted with a benzene ring on the β-carbon to the ester are likely to give pyrroles in good yields.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d21f19de37fd07b0491e529eb3009b60
https://doi.org/10.1002/chin.201338107
https://doi.org/10.1002/chin.201338107
Autor:
Norio Takamura, Tokuro Oh-Ishi, Hirozumi Inoue, Mikio Takeda, Masaaki Nagasawa, Masamichi Morimoto, Tsunehiro Harada
Publikováno v:
ChemInform. 24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24d92b32cf02684119cf847f6cdf9c29
https://doi.org/10.1002/chin.199306216
https://doi.org/10.1002/chin.199306216
Autor:
Y. Matsuoka, S. Sugasawa, Norio Takamura, A. Kawai, M. Yamada, H. Iwata, T. Fukushima, M. An-Naka, K. Yasuda
Publikováno v:
ChemInform. 26
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b7f6758c7dfe0f91682079c5c30e722
https://doi.org/10.1002/chin.199526236
https://doi.org/10.1002/chin.199526236