Synthesis and spectral properties of cyclopropyl-substituted phosphaalkenes
摘要:
Cyclopropanecarboxylic acid chlorides 5a-d react with tris(trimethylsilyl)phosphane 6 in benzene at -2 degrees C to form cyclopropylcarbonyl-bis(trimethylsilyl)phosphanes 7. These products undergo silylic rearrangement at 25 degrees 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.
Synthesis and spectral properties of cyclopropyl-substituted phosphaalkenes
摘要:
Cyclopropanecarboxylic acid chlorides 5a-d react with tris(trimethylsilyl)phosphane 6 in benzene at -2 degrees C to form cyclopropylcarbonyl-bis(trimethylsilyl)phosphanes 7. These products undergo silylic rearrangement at 25 degrees 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.