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- W1978635132 abstract "The thiophosphoranyl-substituted (triphenylphosphoranylidene)methanes 1, 6a, b are cleaved photolytically (λ > 300 nm, 3 d, 0 °C) to yield triphenylphosphane and the thio-aza-phosphetanes 3 and 8 a, b, b′, respectively. The formation of these heterocycles is explained invoking insertion of the carbenes 2 and 7 a, b into the methine CH bond of one of the isopropyl groups. If 6a is irradiated for 16 h in the presence of the phosphanes P(NMe 2 ) 3 , P(OMe) 3 or P( n Bu) 3 , the new ylides 9 a, b, c are obtained along with small quantities of 8 a. These results indicate a cleavage of the ylidic bond in 1 and 6 a, b. The failure of attempted cyclopropanation reactions of olefins as well as the absence of the expected product of a 1,2-H shift, 10, in the case of the photolysis of 6b leave doubts as to the occurrence of free carbenes." @default.
- W1978635132 created "2016-06-24" @default.
- W1978635132 creator A5063987926 @default.
- W1978635132 date "1990-02-01" @default.
- W1978635132 modified "2023-09-24" @default.
- W1978635132 title "Spaltung der Ylid-Bindung in Phosphor-Yliden: Photolyse von thiophosphoranylsubstituierten (Triphenylphosphoranyliden)methanen / Cleavage of Ylidic Bonds in Phosphorus Ylides: Photolysis of Thiophosphoranyl-Substituted (Triphenylphosphoranylidene)methanes" @default.
- W1978635132 doi "https://doi.org/10.1515/znb-1990-0210" @default.
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