Recommanded Product: 58081-05-3. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: (R)-4-Hydroxydihydrofuran-2(3H)-one, is researched, Molecular C4H6O3, CAS is 58081-05-3, about A novel synthesis of (R)- and (S)-4-hydroxytetrahydrofuran-2-ones.
The hydroxy ester I (R = H, R1 = OH), prepared from L-ascorbic acid by sequential treatment with acetone and AcCl, 30% H2O2 and CaCO3, and Me2SO4, was treated with MeSO2Cl and pyridine in CH2Cl2 to give 90% I (R = H, R1 = MeSO3), which, when heated at 85° with LiCl in DMF furnished a mixture of the erythro and threo chloro esters I (R = Cl, R1 = H; R = H, R1 = Cl) (II). Upon hydrogenolysis with 10% Pd/C in the presence of Et3N, II yielded the ester I (R = R1 = H), which was treated with dilute HCl giving a nearly quant. yield of hydroxylactone III. The (S)-enantiomer was analogously prepd from D-isoascorbic acid.
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Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem