Enantioenriched helicenes and helicenoids containing main-group elements (B, Si, N, P)

K Dhbaibi, L Favereau, J Crassous - Chemical reviews, 2019 - ACS Publications
In this review, we discuss the rich chemistry of helicenes and helicenoids containing main-
group elements. Enantioenriched helicenic derivatives containing main-group elements B …

Helicenes: synthesis and applications

Y Shen, CF Chen - Chemical reviews, 2012 - ACS Publications
Helicenes are polycyclic aromatic compounds with nonplanar screw-shaped skeletons
formed by ortho-fused benzene or other aromatic rings. 1, 2 The first helicenes 1 and 2 …

A straightforward route to helically chiral N‐heteroaromatic compounds: practical synthesis of racemic 1, 14‐diaza [5] helicene and optically pure 1‐and 2‐aza [6] …

J Míšek, F Teplý, IG Stará, M Tichý… - Angewandte Chemie …, 2008 - Wiley Online Library
Helicenes have attracted attention as unique inherently chiral three-dimensional aromatic
compounds for several decades. Despite significant recent progress in the synthesis and …

Enhanced basicity of push–pull nitrogen bases in the gas phase

ED Raczyńska, JF Gal, PC Maria - Chemical Reviews, 2016 - ACS Publications
Nitrogen bases containing one or more pushing amino-group (s) directly linked to a pulling
cyano, imino, or phosphoimino group, as well as those in which the pushing and pulling …

Helical Chiral Pyridine N‐Oxides: A New Family of Asymmetric Catalysts

J Chen, N Takenaka - Chemistry–A European Journal, 2009 - Wiley Online Library
Optically active chiral alkyl chlorides are valuable compounds because of their bioactivity
and versatile synthetic utility. Accordingly, the ring opening of epoxides with a chloride …

Applications of Helical‐Chiral Pyridines as Organocatalysts in Asymmetric Synthesis

Z Peng, N Takenaka - The Chemical Record, 2013 - Wiley Online Library
A new family of chiral pyridines has been designed and synthesized for use in asymmetric
organocatalysis. Thus, helical‐chiral pyridines induce high enantioselectivity in a range of …

Molecular ion formation on activated field emitters in atmospheric pressure field desorption mass spectrometry

M Hoyer, JH Gross - Analytical and Bioanalytical Chemistry, 2023 - Springer
Atmospheric pressure field desorption (APFD) mass spectrometry (MS) has recently been
explored as a new contribution to the field of ambient desorption/ionization (ADI) …

Can electrospray mass spectrometry quantitatively probe speciation? Hydrolysis of uranyl nitrate studied by gas-phase methods

NG Tsierkezos, J Roithova, D Schröder… - Inorganic …, 2009 - ACS Publications
Electrospray ionization of uranyl nitrate dissolved in water generates gaseous species
containing either hydroxo− uranyl [UO2 (OH)]+ or nitrato− uranyl [UO2 (NO3)]+ contact ion …

[2+ 2+ 2] Cycloisomerisation of aromatic cyanodiynes in the synthesis of pyridohelicenes and their analogues

J Klívar, A Jančařík, D Šaman, R Pohl… - … A European Journal, 2016 - Wiley Online Library
We have developed a methodology for the synthesis of pyridohelicenes and their analogues
based on the Ni0‐, CoI‐or RhI‐mediated intramolecular [2+ 2+ 2] cycloisomerisation of …

Synthesis of Helical Indolophenanthridines Showing Aggregation-Induced Emission

I Marten, J Podlech - Organic Letters, 2024 - ACS Publications
Helical indolo [2, 3-k]-and [3, 2-a] phenanthridines were synthesized from amines by amide
formation and Morgan–Walls cyclization. The synthetic routes offer the advantage of late …