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    • 49. 发明授权
    • Organomercaptomethyl-silicon compounds and production
    • 有机巯基甲基硅化合物和生产
    • US3345393A
    • 1967-10-03
    • US28690963
    • 1963-06-11
    • BAYER AG
    • WALTER SIMMLERHANS NIEDERPRUM
    • C07F7/08C07F7/18C08G77/00C08G77/28C08G77/392
    • C08G77/00C07F7/0834C07F7/0856C07F7/0889C08G77/392C10M3/00C10M2227/04C10M2229/053C10N2220/02
    • 1,054,032. Organomercaptomethyl silicon compounds. FARBENFABRIKEN BAYER A.G. June 18, 1963 [June 30, 1962], No. 24206/63. Headings C3S and C3T. Organomercaptomethyl silicon compounds are prepared by the reaction of (1 )(a) an organopolysiloxane, R n SiO 4-n , where n is 1-3 and at 2 least one of the siloxane units has the formula BrCH 2 -Si(CH 3 ) m O 3-m /2 X 3-m , where m is 1 or 2 and X is chlorine or a hydrolysable alkoxy group, with (2) a mercaptan, which may be substituted by -OH, or a thiophenol, in the presence of at least an equivalent of a tertiarynitrogen base. The invention also comprises the novel compounds 1,3-di-(n-butylmercaptomethyl) - 1,1,3,3 - tetra - methyldisilane, 1,3- di - (phenylmercaptomethyl)- 1,1,3,3 - tetramethyldisilane, α,# - di - (# 1 - hydroxy - ethylmercaptomethyl) - dodeca - (dimethylsilane), 2,2 - dimethyl - 2 - sila - 1,4 - oxathiane, the bromide of 2,2,6,6 - tetramethyl - 2,6 - disila- 4 - (# - hydroxyethyl) - 1,4 - oxathiane and compounds of the formulµ where the value of each of a, b and c approximates to 7, their sum total being 21 and compound II having a refractive index of 1-4491. The reaction is effected, normally with heating, by the addition of the bromomethyl silicon compound to a mixture of the mercaptan and base, or vice versa. Either or both components may be diluted with an inert solvent, e.g. benzene or its homologues. The reaction of a #-hydroxyl substituted mercaptan with a bromomethyl silane of the above formula, where X is alkoxy, proceeds with elimination of the appropriate alcohol and formation of a six-membered heterocyclic ring, e.g. #-hydroxyethylmercaptan and dimethyl-(bromomethyl)- ethoxy silane yield 2,2-dimethyl-2-sila-1,4-oxathiane. If the ethoxy silane is replaced by dimethyl - (bromomethyl) - chloro - silane the reaction yields 1,4-dithiane and a sulphonium salt, the bromide of 2,2,6,6-tetramethyl-2,6- disila - 4 - (# - hydroxyethyl) - 1,4 - oxathiane; this oxthiane derivative can also be obtained, by the present process, from 1,3-di-(bromomethyl)- 1,1,3,3 - tetra - methyldisilane and # - hydroxyethyl mercaptan. If the hydroxyl group of an -OH-substituted mercaptan is further from the S atom than #, the reaction product is a linear polymer. Examples describe the preparation of the novel compounds specified above.