3-di-tert-butylthiirane-2-thione S-oxide 4 gave di-tert-butyl ketone 5 and carbon disulfide (CS2). Treatment of α-dithiolactone S-oxide 4 with excess m-CPBA or triphenylphosphine gave di-tert-butylthioketene S-oxide 3 almost quantitatively. Treatment of 4 with (η2-ethylene)bis(triphenylphosphine)platinum(0) 13 or tetrakis(triphenylphosphine) palladium 17 resulted in the formation of thiolato sulfinato–platinum
Thioketen S-oxides 1 react with 2-diazopropane (2a) to give 1-pyrazoline-4-thione S-oxides 3 Addition of diazomethane to 1 yields a stable 1:1-adduct only from the S-oxide 1c. The constitution of both types of cycloadducts (3, 11) was proven by X-ray diffraction. Irradiation of 3 leads to loss of nitrogen to afford the alkylidene thiirane S-oxides 12.
Oxidation of thioketens by singlet oxygen and ozone
作者:V. Jayathirtha Rao、V. Ramamurthy
DOI:10.1039/c39810000638
日期:——
Di-t-butylthioketen (1) readily reacts with singletoxygen to yield unexpected products (based on the behaviour of other heterocumulenes) and reacts with ozone to give, quantitatively, the corresponding sulphoxide (2)
Reaction of di-tert-butyl thioketene S-oxide with Lawesson reagent gave 3,3-di-tert-butylthiirane-2-thione in 88% yield. Oxidation of thiirane-2-thione with m-chloroperbenzoic acid afforded 3,3-di-tert-butylthiirane-2-thione S-oxide. The reaction of thiirane-thione was described.