Total Synthesis of Aspidosperma and Strychnos Alkaloids through Indole Dearomatization
Monoterpenoid indole alkaloids are the major class of tryptamine‐derived alkaloids found in
nature. Together with their structural complexity, this has attracted great interest from …
nature. Together with their structural complexity, this has attracted great interest from …
2‐and 3‐Vinylindoles as 4π Components in Cycloaddition Reactions
E Rossi, G Abbiati, V Pirovano - European Journal of Organic …, 2017 - Wiley Online Library
The review summarizes the most recent achievements in the chemistry of 2‐vinylindoles and
3‐vinylindoles. In particular, we focus on the behavior of these compounds as dienes in …
3‐vinylindoles. In particular, we focus on the behavior of these compounds as dienes in …
Catalytic asymmetric Nazarov cyclization of heteroaryl vinyl ketones through a crystallographically defined chiral dinuclear nickel complex
T Takeda, S Harada, A Nishida - Organic letters, 2015 - ACS Publications
A Ni (NTf2) 2 and tetradentate bisimino-bisquinoline ligand complex catalyzed the
enantioselective Nazarov cyclization of heteroaryl vinyl ketones. An X-ray-quality crystal was …
enantioselective Nazarov cyclization of heteroaryl vinyl ketones. An X-ray-quality crystal was …
Chiral holmium complex-catalyzed synthesis of hydrocarbazole from siloxyvinylindole and its application to the enantioselective total synthesis of (−)-Minovincine
T Morikawa, S Harada, A Nishida - The Journal of Organic …, 2015 - ACS Publications
The catalytic and enantioselective total synthesis of (−)-minovincine has been
accomplished. The key highly substituted hydrocarbazole derivative was obtained by an …
accomplished. The key highly substituted hydrocarbazole derivative was obtained by an …
Synthesizing Chiral Hydrocarbazoles with a Tetrasubstituted Carbon Using Holmium-Catalyzed Enantioselective [4+ 2] Cycloaddition: Mechanistic Insights from …
S Harada, S Sekino, M Inaba, A Okita… - The Journal of …, 2024 - ACS Publications
This study analyzes the feasibility of utilizing the catalytic and enantioselective [4+ 2]
cycloaddition of sterically demanding heterocycle-incorporated siloxydienes to yield …
cycloaddition of sterically demanding heterocycle-incorporated siloxydienes to yield …
Catalytic and Enantioselective Diels‐Alder Reaction of Siloxydienes
S Harada, A Nishida - Asian Journal of Organic Chemistry, 2019 - Wiley Online Library
Diels‐Alder reaction is one of the most well‐known named reactions in organic chemistry. It
involves a diene substrate and a dienophile substrate. Among dienes, siloxydiene is a …
involves a diene substrate and a dienophile substrate. Among dienes, siloxydiene is a …
Highly enantioselective construction of carbazole derivatives via [4+ 2] cycloaddition of silyloxyvinylindoles and β, γ-unsaturated α-ketoesters
X Zhao, H Mei, Q Xiong, K Fu, L Lin, X Liu… - Chemical …, 2016 - pubs.rsc.org
A highly efficient catalytic asymmetric [4+ 2] cycloaddition of silyloxyvinylindoles with β, γ-
unsaturated α-ketoesters has been accomplished by an available chiral N, N …
unsaturated α-ketoesters has been accomplished by an available chiral N, N …
[HTML][HTML] Total synthesis of carbazomycins A and B
S Wu, S Harada, T Morikawa… - Chemical and …, 2018 - jstage.jst.go.jp
Total syntheses of carbazomycins A and B were demonstrated using a ytterbium-catalyzed
Diels–Alder reaction with (silyloxyvinyl) indole as a diene. The densely substituted benzene …
Diels–Alder reaction with (silyloxyvinyl) indole as a diene. The densely substituted benzene …
Optically Active Helical Lanthanide Complexes: Storable Chiral Lewis Acidic Catalysts for Enantioselective Diels–Alder Reaction of Siloxydienes
S Harada, S Nakashima, S Sekino… - Chemistry–An Asian …, 2020 - Wiley Online Library
Lanthanide triflates and a series of hexadentate chiral ligand complexes were synthesized.
X‐ray‐quality crystals were obtained from mixtures of the lanthanide complexes, which were …
X‐ray‐quality crystals were obtained from mixtures of the lanthanide complexes, which were …
Employing α‐diazocarbonyl compound chemistry in the assembly of medicinally important aryl (alkyl) thiolactam scaffold
D Barkhatova, D Zhukovsky, D Dar'in… - European Journal of …, 2019 - Wiley Online Library
RH2 (OAc) 4‐catalyzed coupling of α‐diazo‐γ‐butyrolactams with a wide range of aliphatic
and aromatic thiols leads to α‐aryl (alkyl) thiolactams in generally good yields. The …
and aromatic thiols leads to α‐aryl (alkyl) thiolactams in generally good yields. The …