Synlett 2014; 25(18): 2558-2573
DOI: 10.1055/s-0034-1379164
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© Georg Thieme Verlag Stuttgart · New York

Synthesis of gem-Difluoromethylenated Compounds Employing α,α-Difluoro-α-phenylsulfanyl-α-trimethylsilylmethane (PhSCF2SiMe3) as a gem-Difluoromethylene Building Block

Darunee Soorukram
Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand   Fax: +66(2)6445126   Email: manat.poh@mahidol.ac.th
,
Chutima Kuhakarn
Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand   Fax: +66(2)6445126   Email: manat.poh@mahidol.ac.th
,
Vichai Reutrakul
Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand   Fax: +66(2)6445126   Email: manat.poh@mahidol.ac.th
,
Manat Pohmakotr*
Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand   Fax: +66(2)6445126   Email: manat.poh@mahidol.ac.th
› Author Affiliations
Further Information

Publication History

Received: 28 July 2014

Accepted after revision: 26 August 2014

Publication Date:
15 October 2014 (online)


Abstract

α,α-Difluoro-α-phenylsulfanyl-α-trimethylsilylmethane (PhSCF2SiMe3) is a synthetically important fluorinating reagent. This account summarizes our work on the synthetic utility of α,α-difluoro-α-phenylsulfanyl-α-trimethylsilylmethane as a versatile gem-difluoromethylene building block for the preparation of a variety of gem-difluoromethylenated compounds.

1 Introduction

2 Fluoride-Catalyzed Nucleophilic Addition of PhSCF2SiMe3 to Carbonyl Compounds

2.1 Synthesis of gem-Difluoromethyl Aryl Ketones

2.2 Synthesis of gem-1,1-Difluoroalkenes

2.3 Synthesis of gem-Difluoromethylenated Cyclopentanol Derivatives

3 Fluoride-Catalyzed Nucleophilic Addition of PhSCF2SiMe3 to N-Substituted Phthalimides and Succinimide Derivatives

3.1 Synthesis of gem-Difluoromethylenated 1-Azabicyclic Compounds

3.2 Asymmetric Synthesis of gem-Difluoromethylenated Pyrrolizidines and Indolizidines

4 Fluoride-Catalyzed Nucleophilic Addition of PhSCF2SiMe3 to Anhydride Derivatives

5 Fluoride-Catalyzed Chemoselective Nucleophilic Addition of PhSCF2SiMe3 to Keto Esters

5.1 Synthesis of gem-Difluoromethylenated Spiro-γ-butyrolactones

5.2 Synthesis of gem-Difluoromethylenated Bicyclo[m.n.0]-alkan-1-ols and Their Ring-Expansion into gem-Difluoromethylenated Macrocyclic Lactones

6 Asymmetric Synthesis of 3,3-Difluoro-2-propanoylbicy­clo[3.3.0]octanes

7 Conclusions