Synthetic Route of C5H6O2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Catalyst-controlled regioselective nitrosocarbonyl aldol reaction of deconjugated butenolides. Author is Mallik, Sumitava; Bhajammanavar, Vinod; Baidya, Mahiuddin.
An unprecedented regiodivergent nitrosocarbonyl aldol reaction of γ-substituted deconjugated butenolides was described. While Lewis base catalyst quinidine leveraged O-selective nitrosocarbonyl aldol reaction exclusively at the γ-position of deconjugated butenolides to produce γ-substituted-butenolides I [R = Me, n-Pr, PhCH2, etc.; R1 = t-BuO, OCH2CH=CH2, PhCH2O, 4-MeC6H4, etc.], Lewis acid catalyst Cu(OTf)2 steered the competitive N-selective nitrosocarbonyl aldol reaction at the β-position, resulting in hetero-β,γ-difunctionalized-butenolides II [R2 = Me, Ph, 4-MeC6H4CH2, PhCH2; R3 = t-Bu, PhCH2, 1-naphthyl, etc.]. Both processes were amenable to a broad range of substrates and scalable, while the latter one represented a rare example of one-pot hetero-β,γ-difunctionalization of butenolide scaffolds.
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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia