Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Zubeda Begum"'
Autor:
Ummareddy Venkata Subba Reddy, Bheemreddy Anusha, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano
Publikováno v:
Catalysts, Vol 12, Iss 12, p 1674 (2022)
Chiral primary α-amino amides, consisting of an adjacent enamine bonding site (Bronsted base site), a hydrogen bonding site (Bronsted acid site), and flexible bulky substituent groups to modify the steric factor, are proving to be extremely valuable
Externí odkaz:
https://doaj.org/article/f38abfafd05743f2b5a5a296ed82aeff
Autor:
Miku Nomura, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano
Publikováno v:
RSC Advances. 13:3715-3722
Catalytic functionality of new optically active thiourea fused γ-amino alcohols was examined in the asymmetric Mannich reaction of β-keto active methylene compounds with imines to afford chiral Mannich products, β-amino keto compounds..
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ba5040d58195fac488e6e0a9f64c4dc
https://doi.org/10.1039/d2ra08317e
https://doi.org/10.1039/d2ra08317e
Autor:
Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano
Publikováno v:
RSC Advances. 13:888-894
Distinct types of new boron fused primary amino amide organocatalysts were designed and synthesized from commercially available amino acids.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20dc0cf0cebc162d304c41816df36881
https://doi.org/10.1039/d2ra06272k
https://doi.org/10.1039/d2ra06272k
Robots are used to make a task or work easier, which is being possible by the advancement in technologies. Like Internet of thing (IoT), Artificial Intelligence (AI) and many other emerging technologies. This robot will be controlled via android mobi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8219449397ebaf92a99da9cafbd1dd54
Autor:
Koji Uwai, Zubeda Begum, Eunsang Kwon, Mitsuhiro Takeshita, Chigusa Seki, Divakar Ganesan, Michio Tokiwa, Suguru Tokiwa, Perumalsamy Parasuraman, Yuko Okuyama, Hiroto Nakano
Publikováno v:
Chirality. 33:454-464
New two catalysts component system comprising of a primary β-amino silyl ethers as an organocatalyst and N-protected amino acids as a co-catalyst put together worked as an efficient organocatalyst system in the hetero Diels-Alder reaction of isatins
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58eab8311e03d155f49766584d67595e
https://doi.org/10.1002/chir.23319
https://doi.org/10.1002/chir.23319
Autor:
Rajkumar Thiyagarajan, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Hiroto Nakano
Publikováno v:
RSC Advances. 11:38925-38932
New small γ-turn type N-primary amino terminal tripeptides were applied for the asymmetric aldol reaction of ketones with aldehydes under neat conditions to afford the chiral aldol products (up to 99%, up to syn : anti/13 : 87 dr, up to 99% ee).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4fb7210e5251ce2ecee4f245f383f84
https://doi.org/10.1039/d1ra08635a
https://doi.org/10.1039/d1ra08635a
Autor:
Koji Uwai, Yuko Okuyama, Hiroto Nakano, Chigusa Seki, Mitsuhiro Takeshita, Michio Tokiwa, Eunsang Kwon, Zubeda Begum, Madhu Chennapuram, Perumalsamy Parasuraman, Suguru Tokiwa
Publikováno v:
RSC Advances. 10:17486-17491
A simple two catalyst component system consisting of primary β-amino alcohols as a catalyst and amino acids as a co-catalyst put together works as an efficient organocatalyst system in the hetero Diels-Alder reaction of isatins with enones to afford
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d849111dbc86e4d18d3e8617d5010590
https://doi.org/10.1039/d0ra03006f
https://doi.org/10.1039/d0ra03006f
Autor:
Suguru Tokiwa, Haruka Sannabe, Yuko Okuyama, Koji Uwai, Michio Tokiwa, Eunsang Kwon, Zubeda Begum, Mitsuhiro Takeshita, Hiroto Nakano, Chigusa Seki
Publikováno v:
RSC advances. 11(1)
Simple primary β-amino alcohols act as an efficient organocatalysts in the asymmetric Michael addition of β-keto esters with nitroalkenes affording highly pure chiral Michael adducts. Also, both enantiomers of the adducts were obtained, depending o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81a4acede740db9795f6c4a630a1a2e3
https://pubmed.ncbi.nlm.nih.gov/35423042
https://pubmed.ncbi.nlm.nih.gov/35423042
Autor:
Hiroto Nakano, Divakar Ganesan, Perumalsamy Parasuraman, Zubeda Begum, Chigusa Seki, Yuko Okuyama, Eunsang Kwon, Koji Uwai, Michio Tokiwa, Suguru Tokiwa, Mitsuhiro Takeshita, Rajkumar Thiyagarajan
Publikováno v:
HETEROCYCLES. 105:369
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::321db33e8f8cba322f44bbd393e2e4d5
https://doi.org/10.3987/com-21-s(r)2
https://doi.org/10.3987/com-21-s(r)2
Publikováno v:
Synthesis. 50:4089-4096
A metal-free remote oxytosylation of 8-amidoquinolines has been achieved using Koser’s reagent to produce 5-tosyloxy-8-amidoquinolines in good yields. This method is compatible with various functional groups present on the aromatic ring.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4883d59c02058cee9920e8b6505fb977
https://doi.org/10.1055/s-0037-1610212
https://doi.org/10.1055/s-0037-1610212