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 …

Recent advances in the development of chiral gold complexes for catalytic asymmetric catalysis

JJ Jiang, MK Wong - Chemistry–An Asian Journal, 2021 - Wiley Online Library
Asymmetric gold catalysis has been rapidly developed in the past ten years. Breakthroughs
have been made by rational design and meticulous selection of chiral ligands. This review …

Enantioselective synthesis of azoniahelicenes by Rh-catalyzed C–H annulation with alkynes

Q Wang, WW Zhang, C Zheng, Q Gu… - Journal of the American …, 2020 - ACS Publications
A rhodium (III)-catalyzed enantioselective C–H activation/annulation process is disclosed.
With a catalyst derived from a chiral CpRh (III) complex and a chiral acid, the direct …

Multiple helicenes featuring synthetic approaches and molecular structures

A Tsurusaki, K Kamikawa - Chemistry Letters, 2021 - academic.oup.com
Helicenes are attractive non-planar polycyclic aromatic hydrocarbons with unique optical
and electronic properties. In recent years, the chemistry of “multiple helicenes” with plural …

Stereospecific Synthesis of Enantiopure [6] Helicene Containing a Seven‐Membered Ring and [7] Helicene by Acid‐Promoted Stepwise Alkyne Annulations of Doubly …

T Ikai, K Oki, S Yamakawa, E Yashima - Angewandte Chemie, 2023 - Wiley Online Library
Enantiopure [6] helicene containing an embedded seven‐membered ring and carbo [7]
helicene (> 99% ee) with opposite helicity were simultaneously and quantitatively (> 99%) …

Catalytic kinetic resolution of helical polycyclic phenols via an organocatalyzed enantioselective dearomative amination reaction

A Chu, B Zhu, X Zhang, H Zhu, J Zhang, X Liu - Science Advances, 2024 - science.org
Despite the considerable potential applications for helically chiral molecules across various
sectors, their catalytic asymmetric synthesis remains nascent and has seen very limited …

π‐Extended Diaza [7] helicenes with Dual Negatively Curved Heptagons: Extensive Synthesis and Spontaneous Resolution into Strippable Homochiral Lamellae with …

F Gan, G Zhang, J Liang, C Shen… - Angewandte Chemie …, 2024 - Wiley Online Library
We report a unique category of π‐extended diaza [7] helicenes with double negative
curvatures. This is achieved by two‐fold regioselective heptagonal cyclization of the …

Consecutively fused single‐, double‐, and triple‐expanded helicenes

W Zheng, T Ikai, K Oki, E Yashima - Natural Sciences, 2022 - Wiley Online Library
We report the quantitative, chemoselective, and diastereospecific formation of the defect‐
free C‐shaped single and S‐and M‐shaped consecutively fused double‐and triple …

Chiral Phosphathiahelicenes: Improved Synthetic Approach and Uses in Enantioselective Gold(I)-Catalyzed [2 + 2] Cycloadditions of N-Homoallenyl Tryptamines

V Magné, Y Sanogo, CS Demmer, P Retailleau… - ACS …, 2020 - ACS Publications
A chiral phosphathiahelicene scaffold displaying a phosphole and a thiophene unit as the
terminal rings of the helical sequence has been synthesized and characterized by …

Helicoselective Synthesis of Indolohelicenoids through Organocatalytic Central‐to‐Helical Chirality Conversion

WL Xu, RX Zhang, H Wang, J Chen… - Angewandte Chemie …, 2024 - Wiley Online Library
We report the helicoselective and convergent construction of indolohelicenoids with
excellent efficiency and stereocontrol. This reaction proceeds through a chiral‐phosphoric …