Tetrahedron p. 219 - 226 (1981)
Update date:2022-08-11
Topics:
Schaumann, E.
Behr, H.
Adiwidjaja, G.
Tangerman, A.
Lammerink, B. H. M.
Zwanenburg, B.
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.
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