Synlett 2005(15): 2352-2356  
DOI: 10.1055/s-2005-872663
LETTER
© Georg Thieme Verlag Stuttgart · New York

Reactions of Vinylidenecyclopropanes with Diaryl Diselenide Catalyzed by Iodosobenzene Diacetate and Further Transformation of the Adducts

Min Shi*, Jian-Mei Lu
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, P. R. China
Fax: +86(21)64166128; e-Mail: Mshi@pub.sioc.ac.cn;
Further Information

Publication History

Received 1 July 2005
Publication Date:
09 August 2005 (online)

Abstract

Reactions of vinylidenecyclopropanes with diaryl di­selenide catalyzed by iodosobenzene diacetate produced the corresponding addition products 4 in moderate to good yields under mild conditions. The further transformation of 4 to the corresponding methylenecyclopropanes 5 has been disclosed in the presence of ­hydrogen peroxide (H2O2) in toluene.

14

The crystal data of 4a has been deposited in CCDC with number 249984. Empirical formula: C35H28Se2; formula weight: 606.49; crystal color, habit: colourless, prismatic; crystal system: triclinic; lattice type: primitive; lattice parameters: a = 10.0837 (10) Å, b = 10.8046 (11) Å, c = 13.6399 (14) Å, α = 72.303 (2)°, β = 82.804 (2)°, γ = 84.953 (2)°, V = 1402.6 (2)Å3; space group: P-1; Z = 2; D calc = 1.436 g/cm3; F 000 = 612; diffractometer: Rigaku AFC7R; residuals: R; Rw: 0.0529, 0.1240.

20

General Procedure.
Under an argon atmosphere, vinylidenecyclopropanes
(0.3 mmol), diphenyl diselenide (0.6 mmol), PhI(OAc)2
(0.1 mmol), and THF (2 mL) were added into a Schlenk tube. The mixture was stirred at 35-40 °C for the time specified in Table [2] , then was purified by a flash column chromatography.