The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-Methylfuran-2(3H)-one(SMILESS: O=C1OC(C)=CC1,cas:591-12-8) is researched.Reference of 5-Methylfuran-2(3H)-one. The article 《Scalable synthesis and polymerization of a β-angelica lactone derived monomer》 in relation to this compound, is published in Green Chemistry. Let’s take a look at the latest research on this compound (cas:591-12-8).
Bio-based levulinic acid is easily ring-closed to α-angelica lactone (α-AL). The α-AL can be isomerized to the conjugated β-AL under the influence of base, but since this is an equilibrium mixture it is very hard to devise a scalable process that would give pure β-AL. This problem was circumvented by distilling the equilibrium mixture to obtain a 90 : 10 mixture of β- and α-AL in 88% yield. This mixture was used for Diels-Alder reactions on 3 terpenes and on cyclopentadiene in up to 100 g scale. The latter DA adduct was subjected to a ROMP reaction catalyzed by the Grubbs II catalyst. The resulting polymer has some similarities to poly-norbornene but is more polar. The polymer can be processed into films with very good transparency.
In addition to the literature in the link below, there is a lot of literature about this compound(5-Methylfuran-2(3H)-one)Recommanded Product: 591-12-8, illustrating the importance and wide applicability of this compound(591-12-8).
Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia