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tert-Butyldiphenylchlorosilane acts as a silylating reagent used to protect alcohols and in the preparation of silyl ethers. It plays a major role as a raw material and a precursor in organic synthesis and pharmaceuticals. It is also used for the synthesis of interphenylene phenyloxazoles which can be used for the treatment of circulatory disorders, angina and stroke.
Silylating agent (see Appendix 4) for the formation, with e.g. imidazole, of t-butyldiphenylsilyl (TBDPS) ethers of alcohols: Can. J. Chem., 53, 2975 (1975); Org. Synth. Coll., 9, 139 (1998). Alternative to tert-Butyldimethylchlorosilane, A13064, allowing selective protection of primary alcohols in the presence of secondary, using DMAP/ pyridine: Helv. Chim. Acta, 69, 1273 (1986), or DMAP/ triethylamine: Tetrahedron Lett., 99 (1979); 26, 1185 (1985). TBDPS ethers tend to be more crystalline and are much more stable to acidic conditions than TBDMS. They can also survive acetal formation and cleavage, as well as the acidic conditions required for cleavage of trityl and THP ethers. Silylation rates of hindered alcohols have been increased in the presence of silver nitrate: J. Am. Chem. Soc., 116, 5050 (1994).
Cleavage occurs readily with TBAF in THF: Org. Synth. Coll., 9, 4 (1998). For use of K10 clay in aqueous MeOH, see: J. Org. Chem., 61, 9026 (1996). Cleavage with BBr3 leads directly to the corresponding alkyl bromides: J. Org. Chem., 53, 3111 (1988).
The silyl copper species derived from the lithio-derivative and CuCN adds to terminal alkynes, giving vinyl copper intermediates which react with electrophiles to give vinyl silanes. The presence of the hindered TBDPS group confers some useful differences in comparison with less hindered silyl groups: J .Chem. Soc., Perkin 1., 1525 (1995); compare Chlorodimethylphenylsilane, A15638. The hindered TBDPS group has also been utilized in the Peterson olefination reaction to promote high (Z)-selectivity: Synthesis, 1223 (2000).
Clement, L. L.; Tsakos, M.; Schaffert, E. S.; Scavenius, C.; Enghild, J. J.; Poulsen, T. B. The amido-pentadienoate-functionality of the rakicidins is a thiol reactive electrophile-development of a general synthetic strategy. Chem. Commun. 2015, 51 (62), 12427-12430.
Liu, Y.; Wang, S. Q.; Zhao, B. X. A novel pyrazoline-based fluorescent probe for detecting fluoride ion in water and its application on real samples. RSC Adv. 2015, 5 (42), 32962-32966.
Gefahrenhinweise (EU): H314-H318
Causes severe skin burns and eye damage. Causes serious eye damage.
Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.