Synlett 2006(2): 157-180  
DOI: 10.1055/s-2005-923611
ACCOUNT
© Georg Thieme Verlag Stuttgart · New York

2-Pyridylsilyl Group: A Useful Multifunctional Group in Organic Synthesis

Kenichiro Itami*a,b, Jun-ichi Yoshida*c
a Research Center for Materials Science, Nagoya University, Nagoya 464-8602, Japan
b PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
Fax: +81(52)7886098; e-Mail: itami@chem.nagoya-u.ac.jp;
c Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
Fax: +81(75)3832727; e-Mail: yoshida@sbchem.kyoto-u.ac.jp;
Further Information

Publication History

Received 11 October 2005
Publication Date:
23 December 2005 (online)

Abstract

The utility of the 2-pyridylsilyl group as a multifunctional group in organic synthesis is described. The use of the 2-pyridylsilyl group as a removable directing group is a powerful synthetic strategy that circumvents the specificity-generality dilemma in metal-mediated organic synthesis. In addition, the utility of the 2-pyridylsilyl group as a phase tag for strategic separation and as a removable hydrophilic group for aqueous reactions is also described.

  • 1 Introduction

  • 2 Transformations of the 2-Pyridylsilyl Group to Other Groups

  • 3 The 2-Pyridylsilyl Group as a Removable Directing Group for Organometallic Reactions

  • 3.1 Deprotonative Lithiation of Methyl(2-pyridyl)silanes

  • 3.2 Peterson Olefination Using [Bis(2-pyridyl­silyl)methyl]lithium

  • 3.3 Carbomagnesation Across Alkenyl(2-pyridyl)silanes

  • 3.4 Carbomagnesation Across Alkynyl(2-pyridyl)silanes

  • 3.5 Mizoroki-Heck Reaction of Alkenyl(2-pyridyl)silanes

  • 3.6 Hiyama Coupling of Alkenyl(2-pyridyl)silanes

  • 3.7 Homocoupling of Alkenyl(2-pyridyl)silanes

  • 3.8 Programmable Synthesis of Arylethene-Based Extended
    π-Systems

  • 3.9 Pauson-Khand Reaction Using Alkenyl(2-pyridyl)silanes

  • 3.10 Stille Coupling of Stannylmethyl(2-pyridyl)silanes

  • 3.11 Hiyama Coupling of Benzyl(2-pyridyl)silanes

  • 3.12 Carbonyl Allylation Using Allyl(2-pyridyl)silanes

  • 3.13 Hydrosilylation Using Hydro(2-pyridyl)silanes

  • 3.14 Allylic Alkylation Directed by the 2-Pyridylsilyl Group

  • 4 The 2-Pyridylsilyl Group as a Phase Tag for Solution-Phase Synthesis

  • 5 The 2-Pyridylsilyl Group as a Removable Hydrophilic Group for Aqueous Reactions

  • 5.1 Diels-Alder Reaction

  • 5.2 Photocycloaddition

  • 6 Conclusions and Outlook

46

Itami, K.; Kamei, T.; Yoshida, J., unpublished results.

49

A review on platform synthesis of multisubstituted olefins: Itami, K.; Yoshida, J. Bull. Chem. Soc. Jpn., in press.

51

A review on platform synthesis: Itami, K.; Yoshida, J. Chem. Eur. J., in press.

53

For boron-based method for the construction of triarylethene-based extended π-systems, see ref. 50b.

91

Catalog numbers in Tokyo Kasei Kogyo Co., Ltd (TCI): 1 (T 2021), 9 (M 1460), 15 (D 2935), 58 (D 2934).

92

Over 500 compounds (>200 pyridylsilylated and >300 non-pyridylsilylated compounds) were synthesized using this chemistry.