Synthesis 2011(15): 2459-2465  
DOI: 10.1055/s-0030-1260096
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Stereoselective Synthesis of Functionalized Cyclopropane Derivatives via α-Thiocyanate Ketone-Based Three-Component Reaction

Fei-Yue Wu, Ying Li, Hui Feng, Qiong Wu, Bo Jiang*, Feng Shi, Shu-Jiang Tu*
School of Chemistry and Chemical Engineering, Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou, Jiangsu, 221116, P. R. of China
Fax: +86(516)83500065; e-Mail: jiangchem@xznu.edu.cn; e-Mail: laotu@xznu.edu.cn;
Further Information

Publication History

Received 30 March 2011
Publication Date:
08 July 2011 (online)

Abstract

α-Thiocyanate ketone-based three-component reactions have been established for the stereoselective synthesis of functionalized electron-deficient trans-cyclopropanes. The multicomponent reactions were conducted by reacting readily available and inexpensive starting materials under microwave irradiation. The procedures are very facile, highly stereoselective, and avoids the use of ylides.

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Single-crystal growth was carried out in ethanol at room temperature. X-ray crystallographic analysis was performed with a Siemens SMART CCD and a Siemens P4 diffractometer (graphite monochromator, MoKα radiation λ = 0.71073 Å). Crystal data for 6a: Empirical formula: C18H11BrN2O; formula weight: 351.20; crystal dimensions 0.48 × 0.40 × 0.30 mm; triclinic; space group P1; a = 8.0590(10) Å, b = 10.3631(12) Å, c = 11.2581(13) Å, α = 63.9500(10)˚, β = 69.676(2)˚, γ = 67.348(2)˚; µ = 2.702 mm; V = 761.34(16) ų; Z = 2; D(calcd) = 1.532 Mg/m³; F(000) = 352, S = 1.058, R 1 = 0.0526, wR 2 = 0.1288