Synthesis 2005(3): 391-396  
DOI: 10.1055/s-2004-834944
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Mild, Convenient and Efficient Single-Step Method for the Synthesis of Polysubstituted Furans via Ammonium Ylide Routes

Mingjin Fana, Lina Guoa, Xueyuan Liua, Weimin Liub, Yongmin Liang*a,b
a National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
b Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
Fax: +86(931)8912582; e-Mail: liangym1@hotmail.com;
Further Information

Publication History

Received 14 September 2004
Publication Date:
08 December 2004 (online)

Abstract

A new and convenient cyclization method for the synthesis of polysubstituted furans in a single-step via ammonium ylide routes was reported. In this process, dimethyl acetylenedicarboxylate reacted with ammonium ylide to produce polysubstituted furan in the presence of anhydrous K2CO3 at room temperature. It is very economical, environmentally friendly and very easy to carry out.

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Crystal data for 3a: CCDC 249973. C14H12O5, mp: 68-70 °C; chemical formula weight: 260.24, monoclinic space group P2 (1)/c, a = 14.698 (2), b = 11.720 (1), c = 7.3105 (7) Å; α = 90.00°, β = 97.92 (9)°, γ = 90.00°, U = 1247.3 (2) Å3. T = 290 (2) K, Z = 4, DC = 1.386 Mg/M3, µ = 0.106 mm-1, λ = 0.71073 Å, F(000) 544, Crystal size 0.52 × 0.48 × 0.48 mm3, 2255 independent reflections [R(int) = 0.0122], Reflections collected 2690: Refinement method, full-matrix least-squares on F2: Goodness-of-fit on F2 1.073: Final R indices [I > 2δ (I)] R1 = 0.0383, wR2 = 0.1038, R indices (all data) R1 = 0.0524, wR2 = 0.0138. Extinction coefficient 0.126 (7), Largest diff. peak and hole 0.173 Å-3 and -0.163e Å-3.