- Platinum(II) complexes incorporating racemic and optically active 1-alkyl-3-phospholene P-ligands: Synthesis, stereostructure, NMR properties and catalytic activity
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Three 1-alkyl-3-phospholene 1-oxides, such as the P-ethyl, P-isobutyl and P-isopentyl derivative were prepared in racemic and enantiopure forms. After deoxygenation, the cyclic phosphines were converted to the corresponding phosphineeboranes and phosphine
- Bagi, Péter,Kovács, Tamara,Szilvási, Tibor,Pongrácz, Péter,Kollár, László,Drahos, László,Fogassy, Elemér,Keglevich, Gy?rgy
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p. 306 - 313
(2014/03/21)
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- Process
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A process is described for the preparation of phospholene-1-oxides and 1-sulfides having an aliphatic substituent in the 1-position, a double bond at the 2- or 3-positions and, optionally, having additional substituents at one or more of positions 2, 3, 4 or 5. The process comprises the reaction of a 1-(2-chloroalkoxy)-phospholene with the appropriate aliphatic alcohol or thiol optionally in the presence of an alkylation catalyst. Use of an aliphatic alcohol gives rise to a phospholene oxide while use of the corresponding thiol gives rise to a phospholene sulfide. The phospholene-1-oxides and 1-sulfides so obtained are useful as catalysts for the conversion of isocyanates to carbodiimides.
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