Detailed Information on Publication Record
2022
BENCH-STABLE AND SOLUBLE FORMALDEHYDE SURROGATES IN ASYMMETRIC HYDROXYMETHYLATION OF ISOINDOLINONES
ŠVESTKA, David and Jan OTEVŘELBasic information
Original name
BENCH-STABLE AND SOLUBLE FORMALDEHYDE SURROGATES IN ASYMMETRIC HYDROXYMETHYLATION OF ISOINDOLINONES
Authors
ŠVESTKA, David (203 Czech Republic, belonging to the institution) and Jan OTEVŘEL (203 Czech Republic, belonging to the institution)
Edition
Student Scientific Conference MUNI Pharm, Doctoral Students 2022, 2022
Other information
Language
English
Type of outcome
Prezentace na konferencích
Field of Study
30104 Pharmacology and pharmacy
Country of publisher
Czech Republic
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14160/22:00126688
Organization unit
Faculty of Pharmacy
ISBN
978-80-280-0105-6
Keywords in English
Enantioselective organocatalysis; isoindolinone; Takemoto catalyst
Změněno: 16/9/2022 15:19, Mgr. David Švestka
Abstract
V originále
The asymmetric cross-aldol reaction with formaldehyde is one of the most efficient carbon chain extension methods. However, performing this type of reaction is not straightforward. Gaseous formaldehyde is a highly reactive and toxic compound. On the other hand, a formalin solution may cause incompatibility issues with many catalytic systems due to the water presence. Finally, the polymeric precursors thereof (para- or metaformaldehyde) are poorly soluble in many organic solvents causing the slow release of the reactive monomer and overall reaction slowdown. For these reasons, research on bench-stable, soluble, and reactive formaldehyde surrogates (“H2C=O cans”) for catalytic reactions is highly desired. The application of formaldehyde releasers in enantioselective hydroxymethylations has not been sufficiently investigated. Therefore, about 20 formaldehyde surrogates were synthesized and evaluated in the asymmetric reaction with model isoindolinone substrate and chiral non-racemic organocatalyst. Screening of our catalyst library revealed that bifunctional molecules containing a basic moiety (particularly the Takemoto-type catalysts) exhibited the best enantioselectivity outcomes. When combined with formaldehyde releasers based on benzotriazole or parabanic acid derivatives, the reactions achieved almost complete conversion (> 96%) and a very good enantiomeric ratio (87:13) in 24 h. This is in sharp contrast with paraformaldehyde, which provided the enantioenriched product in 10% only.
Links
MUNI/IGA/0916/2021, interní kód MU |
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