Pregled bibliografske jedinice broj: 873459
Sulfuric acid and Amberlyst-H+ catalyzed condensation reactions of renewable keto acids with paraformaldehyde: synthesis of a new dispiro bis-lactone ring system 2, 9, 13-trioxadispiro[4.1.4.3]tetradecane-3, 6, 10-trione
Sulfuric acid and Amberlyst-H+ catalyzed condensation reactions of renewable keto acids with paraformaldehyde: synthesis of a new dispiro bis-lactone ring system 2, 9, 13-trioxadispiro[4.1.4.3]tetradecane-3, 6, 10-trione // RSC Advances, 7 (2017), 23917-23923 doi:10.1039/c7ra02303k (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 873459 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Sulfuric acid and Amberlyst-H+ catalyzed condensation reactions of renewable keto acids with paraformaldehyde: synthesis of a new dispiro bis-lactone ring system 2, 9, 13-trioxadispiro[4.1.4.3]tetradecane-3, 6, 10-trione
Autori
Amarasekara, Ananda S. ; Ha, Uyen ; Fonari, Marina S. ; Bejagam, Shabari Nath ; Margetić, Davor
Izvornik
RSC Advances (2046-2069) 7
(2017);
23917-23923
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
organic synthesis, condensation, lactone
Sažetak
The sulfuric acid and Amberlyst-H+ catalyzed condensation reactions of renewable feedstock levulinic acid with paraformaldehyde under neat conditions at 80 °C gives 2, 9, 11, 14-tetraoxadispiro[4.1.5.3]pentadecane-3, 6-dione in 91–93% yield, in which the structure was confirmed by single crystal X-ray crystallography. A similar condensation reaction between 4-ketopimelic acid and paraformaldehyde at 80 °C gives 2, 9, 13-trioxadispiro[4.1.4.3]tetradecane-3, 6, 10-trione. This new dispiro bis-lactone was found to composed of a 1.6:1 mixture of isomers with planes of symmetry bisecting the tetrahydro-2H-pyran-4-one rings through the carbonyl groups.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
