| 摘要 |
A new process prepares retiferol derivatives of formula I: wherein A is -C=C- or -CH=CH-, and R1 and R2 are independently of each other lower alkyl or lower perfluoroalkyl, one version couples ketones of formula II with compounds of formula III A second version couples phosphinoxides of formula IV with aldehydes of formula V. Compounds of formula I are useful in the treatment or prevention of hyperproliferative skin diseases and for reversing the conditions associated with photodamage.
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