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Triisopropylsilyl trifluoromethanesulfonate is used as a reagent for the introduction of triisopropylsilyl(TIPS) group in organic synthesis. It is involved in the synthesis of 2-substituted benzothiopyran-4-ones and silyloxy acetylenes. As a protecting group in organic synthesis, it is utilized especially for the protection of primary amines. Furthermore, it plays an important role in Takahashi Taxol total synthesis or for chemical glycosylation reactions.
Reagent for introduction of the triisopropylsilyl (TIPS) group: Tetrahedron Lett., 22, 3455 (1981); compare Chlorotriisopropylsilane, A17376, and Appendix 4. For general reactions of silyl triflates, see Trimethylsilyl trifluoromethanesulfonate, A12535.
For use in the synthesis of 2-substituted benzothiopyran-4-ones, see: Synlett, 182 (1996):
A method for protecting both H atoms of a primary amine consists of formation of the succinimide, followed by enolsilylation with TIPS-OTf, to form the 2,5-bis(triisopropylsiloxy)pyrroles. Deprotection can be effected by desilylation with dilute HCl, followed by hydrazinolysis: Tetrahedron Lett., 38, 2617 (1997).
For a comprehensive review of the TIPS group in organic chemistry, see: Chem. Rev., 95, 1009 (1995).
Hayashi, Y.; Yamazaki, T.; Nakanishi, Y.; Ono, T.; Taniguchi, T.; Monde, K.; Uchimaru, T. Asymmetric Nitrocyclopropanation of alfa-Substituted alfa, beta-Enals Catalyzed by Diphenylprolinol Silyl Ether for the Construction of All-Carbon Quaternary Stereogenic Centers. Eur. J. Org. Chem. 2015, 2015 (26), 5747-5754.
Chang, J. C.; Lai, C. C.; Chiu, S. H. A Redox-Controllable Molecular Switch Based on Weak Recognition of BPX26C6 at a Diphenylurea Station. Molecules 2015, 20 (2), 1775-1787.
Gefahrenhinweise (EU): H314-H318
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