Results 271 to 280 of about 3,572,666 (356)
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Recent advances in nucleophile-triggered CO2-incorporated cyclization leading to heterocycles.
Chemical Society Reviews, 2019Carbon dioxide (CO2) has emerged as a sustainable, feasible, abundant one-carbon synthon and displays great potential in the synthesis of heterocycles such as lactones, lactams, and 2-oxazolidinones, which are privileged motifs in pharmaceutical ...
Sheng Wang, C. Xi
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Stereoselective Electrophilic Cyclization
The Chemical Record, 2015AbstractElectrophilic cyclizations of unactivated alkenes play highly important roles in the synthesis of useful building blocks. This account describes our contributions to the rational design of monofunctionalized chiral Lewis base catalysts for enantioselective iodo‐ and protocyclizations.
Akira, Sakakura, Kazuaki, Ishihara
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Metal-Catalyzed (4 + 3) Cyclization of Vinyl Aziridines with para-Quinone Methide Derivatives
ACS Catalysis, 2018The development of (4 + 3) cyclizations of vinyl aziridines, especially catalytic asymmetric versions, is needed in organic synthesis. This report describes an iridium-catalyzed (4 + 3) cyclization of vinyl aziridines with para-quinone methide (p-QM ...
Fei Jiang +4 more
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Biomimetic polyene cyclizations
Bioorganic Chemistry, 1976AbstractCertain polyenic substances having trans olefinic bonds in a 1,5 relationship can be induced to undergo stereospecific, non‐enzymic, cationic cyclization to give polycyclic products with all‐trans (“natural”) configuration. These transformations appear to mimic in principle the biogenetic conversion of squalene into polycyclic triterpenoids ...
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Enantioselective polyene cyclizations
Organic & Biomolecular Chemistry, 2016A comprehensive review covering the field of enantioselective polyene cyclizations.
Chad N, Ungarean +2 more
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Scholl Cyclizations of Aryl Naphthalenes: Rearrangement Precedes Cyclization
The Journal of Organic Chemistry, 2015In 1910, Scholl, Seer, and Weitzenbock reported the AlCl3-catalyzed cyclization of 1,1'-binaphthyl to perylene. We provide evidence that this classic organic name reaction proceeds through sequential and reversible formation of 1,2'- and 2,2'-binaphthyl isomers.
Sarah L, Skraba-Joiner +4 more
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Azo cyclization: peptide cyclization via azo bridge formation
The Journal of Peptide Research, 2002Abstract: A novel method for peptide cyclization in solution: the azo cyclization is presented herein. Ring closure by forming an azo bridge was achieved in situ by connecting the corresponding side chains of para amino phenylalanine (Pap) residues to those of tyrosine or histidine residues present in the corresponding linear precursors.
G, Fridkin, C, Gilon
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Cascade asymmetric dearomative cyclization reactions via transition-metal-catalysis
Nature Synthesis, 2022Yang-Zi Liu, Hao Song, C. Zheng, S. You
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2009
Also known as Borsche carbazole synthesis, is the two-step conversion of phenyl hydrazine and cyclohexanone derivatives to the corresponding carbazole. Cf. Fischer indole synthesis.
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Also known as Borsche carbazole synthesis, is the two-step conversion of phenyl hydrazine and cyclohexanone derivatives to the corresponding carbazole. Cf. Fischer indole synthesis.
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2020
Advance Warning! This is a problem without many clear answers. That doesn’t mean we cannot use it to practise the basics. In this case, the basics are correct curly arrows and consideration of the shape of a compound when it reacts.
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Advance Warning! This is a problem without many clear answers. That doesn’t mean we cannot use it to practise the basics. In this case, the basics are correct curly arrows and consideration of the shape of a compound when it reacts.
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