Synlett 2007(16): 2483-2491  
DOI: 10.1055/s-2007-986646
ACCOUNT
© Georg Thieme Verlag Stuttgart · New York

A Bulky Silylene Generated under Mild Conditions: Its Application to the Synthesis of Organosilicon Compounds

Nobuhiro Takeda, Norihiro Tokitoh*
Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
Fax: +81(774)383209; e-Mail: tokitoh@boc.kuicr.kyoto-u.ac.jp;
Further Information

Publication History

Received 20 March 2007
Publication Date:
12 September 2007 (online)

Abstract

By taking advantage of the bulky silylene Tbt(Mes)Si: (1) [Tbt = 2,4,6-(Me3Si)3C6H2, Mes = 2,4,6-Me3C6H2], generated under mild conditions from disilene Tbt(Mes)Si=Si(Mes)Tbt (2) or silylene-isocyanide complexes Tbt(Mes)SiCNAr (5), the synthesis of a variety of reactive silicon compounds, such as 2H-azasilirene, 2H-phosphasilirene, vinylsiliranes, silanone (intermediate) and ­silacyclic compounds containing chalcogens, was achieved. In ­addition, some unique reactivities of silylene 1, that is, [1+2] cyclo­addition reactions to benzene and naphthalene, a double addition ­reaction with CS2 giving a disilacyclobutanethione derivative, and insertion reactions into B-H, B-F, B-Cl, and B-B bonds, were also revealed.

1 Introduction

2 Formation of a Bulky Silylene from the Corresponding ­Disilene

3 Application of the Bulky Silylene to the Synthesis of ­Reactive Silicon Compounds

3.1 Synthesis of Silylene-Isocyanide Complexes

3.2 Synthesis of a 2H-Azasilirene and a 2H-Phosphasilirene

3.3 Synthesis of Vinylsiliranes, the Intermediates in the ­Reaction with Dienes

3.4 Formation of a Silanone, a Silicon-Oxygen Double-Bond Compound

3.5 Synthesis of Silacyclic Compounds Containing Chalcogens

4 New Reactivities of the Bulky Silylene

4.1 [1+2] Cycloaddition to Aromatic Compounds

4.2 Reaction with Carbon Disulfide

4.3 Insertion into B-H, B-Cl, and B-B Bonds

5 Conclusion and Outlook

1

Present address: Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1 Tenjincho, Kiryu Gunma 376-8515, Japan.