3-Substituted coumarins are formed in 37–63% yields by the reaction of 2-(acyloxy)arylaldehydes with the TiC4/R3N reagent system. The structure of the compound 2c was determined by single crystal X-ray analysis.
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Crystal data: For compound 2c: molecular formula: C11H10O2, MW = 174.19, monoclinic, space group: P21/n, a = 7.3522(13) Å, b = 10.4605(18) Å, c = 11.731(2) Å, β = 102.889(3)°, V = 879.5(3) Å3, Z = 4, ρc = 1.316 Mg/m3, Wavelength of radiation = 0.71073 Å, μ = 0.091 mm−1, T = 293(2) K. Of the 6244 reflections collected, 1728 were unique (Rint = 0.0195). Refinement on all data converged at R1 = 0.0408, wR2 = 0.1141 (Deposition number CCDC 605887).
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