Safety of Methyl 5-fluoro-3-pyridinecarboxylate. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Methyl 5-fluoro-3-pyridinecarboxylate, is researched, Molecular C7H6FNO2, CAS is 455-70-9, about A general synthesis of substituted fluorenones and azafluorenones. Author is Kyba, Evan P.; Liu, Shiuh Tzung; Chockalingam, Kannappan; Reddy, B. Raghava.
Twenty-one variously substituted fluorenones and azafluorenones I (X, X1, X2 = CH, N; R, R1 = H, alkyl, halo, etc.) were prepared The key ring-forming step was photochem. Pschorr cyclization of 2-diazoniodiaryl ketones II (same R, R1, X-X2) under direct, (bpy)3Ru(II)- (bpy = 2,2′-bipyridine), or (bpy)3Ru(II)-Cu(II)-photosensitized conditions. Where selectivities were possible in the ring closure, the isomer ratios obtained were in accord with an intermediate aryl radical.
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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem