Synthesis 2007(4): 515-522  
DOI: 10.1055/s-2007-965900
PAPER
© Georg Thieme Verlag Stuttgart · New York

Phosphine-Catalyzed Tandem α-O-Addition and Transesterification of Oxgen Pronucleophiles on Arylpropiolates: A New Route to Dioxygenated Heterocyles

Sandra Gabillet, Delphine Lecerclé, Olivier Loreau, Sophie Dézard, Jean-Marie Gomis, Frédéric Taran*
CEA, DSV, DBJC, SMMCB, 91191 Gif-sur-Yvette, France
Fax: +33(1)69087991; e-Mail: frederic.taran@cea.fr;
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Publikationsverlauf

Received 5 September 2006
Publikationsdatum:
22. Januar 2007 (online)

Abstract

A practical one step procedure for the synthesis of 1,4-dioxane-2-one and 1,4-benzodioxine-2-one derivatives is described.

11

X-ray crystal structure data for 11: Empirical formula: C15H10O3; Formula weight: 238.2; T = 293 (2) K, λ = 0.71073 Å; Crystal system = orthorhombic; Space group: Pbca; Unit cell dimensions: a = 24.607 (8) Å, b = 12.508 (5) Å, c = 7.391 (4) Å, α = β = γ = 90.00°; V = 2274.8 Å3; Z = 8; Dcalc = 1.391g/cm3; Absorption coefficient: 0.097 mm-1; F(000) = 992; Crystal size: 0.65 × 0.45 × 0.15 mm; Reflections collected: 14778; Independent reflections: 2528 [R(int) = 0.0194]; Refinement method, full-matrix least-squares on F2; Goodness-of-fit on F2: 1.034; Final R indices [I > 2σ(I)] R1 = 0.0420, wR2 = 0.1005; R indices (all data) R1 = 0.0659, wR2 = 0.1157; Extinction coefficient: 0.021 (2); Largest diff. peak and hole: 0.144 and -0.145e Å-3.