Abstract
A facile and efficient one-pot synthesis of 1,3-disubstituted
pyridin-2(1H )-ones is developed via a
novel cascade reaction of readily available α-hydroxy-α-carbamoyl
ketene S ,S -acetals under Vilsmeier
conditions (DMF/POCl3 ), and a mechanism of this domino
reaction is proposed.
Key words
pyridin-2(1H )-ones - Vilsmeier
reagent - α-hydroxyketene S ,S -acetals
References and Notes
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Crystal data for 3a :
C14 H13 NO2 S, colorless crystal, M = 259.31,
monoclinic, space group P 21 , a = 5.6429(13), b = 12.163(3), c = 9.504(2), Å, V = 652.3(3) ų , α = 90.00, β = 90.00, γ = 90.00, Z = 2, T = 293 (2)
K, F
000 = 272, R 1 = 0.0428, wR 2 = 0.1077.
CCDC 690433 contains the supplementary crystallographic data for
this paper. These data can be obtained free of charge from The Cambridge Crystallographic
Data Centre via www.ccdc.cam.ac.uk/data_request/cif.