e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Synthesis and spectral properties of cyclopropyl-substituted phosphaalkenes
AB Kostitsyn, H Ruzek, H Heydt, M Regitz…
Index: Kostitsyn, A. B.; Ruzek, H.; Heydt, H.; Regitz, M.; Nefedov, O. M. Russian Chemical Bulletin, 1994 , vol. 43, # 4 p. 635 - 640 Izvestiya Akademi Nauk, Seriya Khimicheskaya, 1994 , # 4 p. 684 - 689
Abstract Cyclopropanecarboxylic acid chlorides 5a-d react with tris (trimethylsilyl) phosphane 6 in benzene at− 2° C to form cyclopropylcarbonyl-bis (trimethylsilyl) phosphanes 7. These products undergo silylic rearrangement at 25° C to yield phosphaalkenes 8. Compounds 8a, b, d are formed as mixtures of Z-and E-isomers where the latter predominate. In the case of 8c, the Z-isomer is formed exclusively.
