| abstract |
Compounds of the formula I n n n R 1 and R 2 independently of one another are C 1 -C 20 alkyl, OR 11 , CF 3 or halogen; R 3 , R 4 and R 5 independently of one another are hydrogen, C 1 -C 20 alkyl, OR 11 or halogen; R 6 , R 7 , R 8 , R 9 and R 10 independently of one another are hydrogen, C 1 -C 20 alkyl; C 2 -C 20 alkyl which is interrupted once or more than once by nonconsecutive O atoms and which is unsubstituted or substituted by OH and/or SH; or R 6 , R 7 , R 8 , R 9 and R 10 are OR 11 , SR 11 , N(R 12 )(R 13 ), phenyl or halogen; R 11 is C 1 -C 20 alkyl, C 3 -C 8 cycloalkyl, phenyl, benzyl or C 2 -C 20 alkyl which is interrupted once or more than once by O or S and which is unsubstituted or substituted by OH and/or SH; R 12 and R 13 independently of one another are hydrogen, C 1 -C 20 alkyl, C 3 -C 8 cycloalkyl, phenyl, benzyl or C 2 -C 20 alkyl which is interrupted once or more than once by nonconsecutive a atoms and which is unsubstituted or substituted by OH and/or SH; or R 12 and R 13 together are C 3 -C 5 alkylene which can be interrupted by O, S or NR 14 ; R 14 is hydrogen, phenyl, C 1 -C 12 alkyl or C 2 -C 12 alkyl which is interrupted once or more than once by O or S and which is unsubstituted or substituted by OH and/or SH; and M is hydrogen, Li, Na or K; are valuable intermediates for the preparation of unsymmetrical bisacylphosphine oxides and monoacylphosphine oxides. |