Asymmetric Diels–Alder reaction involving dynamic enantioselective crystallization

N Uemura, S Toyoda, H Ishikawa… - The Journal of …, 2018 - ACS Publications
Asymmetric Diels–Alder reaction was achieved under achiral conditions. Reaction of
prochiral 2-methylfuran and N-phenylmaleimide in heptane or hexane solution at 80° C …

Near‐infrared circularly polarized light triggered enantioselective photopolymerization by using upconversion nanophosphors

G Yang, L Zhu, J Hu, H Xia, D Qiu… - … A European Journal, 2017 - Wiley Online Library
Circularly polarized light (CPL) is considered to be a true chiral entity and has been
suggested as an explanation for the introduction of initial chiral biases into key biomolecular …

Supramolecular chirality induced by a weak thermal force

P Mineo, V Villari, E Scamporrino, N Micali - Soft Matter, 2014 - pubs.rsc.org
We show that the unexpected chirality of aggregated structures based on an uncharged
achiral porphyrin system originates from small temperature gradients that act as an …

Asymmetric induction via short-lived chiral enolates with a chiral C–O axis

T Yoshimura, K Tomohara… - Journal of the American …, 2013 - ACS Publications
A novel method has been developed for the asymmetric cyclization of alkyl aryl ethers. The
reactions were assumed to proceed via short-lived chiral enolate intermediates with a chiral …

Absolute Asymmetric Synthesis of an Aspartic Acid Derivative from Prochiral Maleic Acid and Pyridine under Achiral Conditions

N Uemura, K Sano, A Matsumoto… - Chemistry–An Asian …, 2019 - Wiley Online Library
The asymmetric synthesis of an aspartic acid derivative, N‐succinopyridine, from prochiral
starting materials involving dynamic enantioselective crystallization was accomplished …

[PDF][PDF] Crystallization‐based separation of enantiomers

Y Wang, A Chen - Stereoselective synthesis of drugs and natural …, 2013 - researchgate.net
Besides asymmetric synthesis, crystallization has also been used widely from bench top to
manufacturing scale for the separation of enantiomers. The most widely used resolution …

α-Arylation of α-amino acid derivatives with arynes via memory of chirality: asymmetric synthesis of benzocyclobutenones with tetrasubstituted carbon

K Kasamatsu, T Yoshimura, A Mandi, T Taniguchi… - Organic …, 2017 - ACS Publications
A method for asymmetric α-arylation of α-amino acid derivatives via memory of chirality has
been developed. Addition of axially chiral enolates, generated from α-amino acid …

Asymmetric synthesis by using natural sunlight under absolute achiral conditions

M Sakamoto, K Shiratsuki, N Uemura… - … A European Journal, 2017 - Wiley Online Library
Irradiation of prochiral (E)‐aroylacrylamide with sunlight gave single‐handed pyrrolinone
quantitatively and with an enantiomeric excess (ee) of over 99% under absolutely achiral …

Asymmetric transformation by dynamic crystallization of achiral succinimides

S Hachiya, Y Kasashima, F Yagishita, T Mino… - Chemical …, 2013 - pubs.rsc.org
Optically active materials could be generated by simple solidification of achiral materials
without an external chiral source. When achiral cis-3, 4-diphenylsuccinimides were solidified …

New evidence about the spontaneous symmetry breaking: Action of an asymmetric weak heat source

P Mineo, V Villari, E Scamporrino… - The Journal of Physical …, 2015 - ACS Publications
In the present study, we show how, in a stagnant water solution of uncharged aggregated
achiral porphyrin-based molecules, a mirror-symmetry breaking (SB) can be induced and …