The present invention provides a compound that has a high whitening effect and is excellent in safety and stability and provides an external preparation for skin comprising the same. The compound of the present invention is a 4-alkylresorcinol derivative represented by formula (1) or a salt thereof:
wherein R1 is a branched or cyclic alkyl group of 3 to 7 carbon atoms or a linear alkyl group of 2 to 5 carbon atoms; R2 and R3 are each independently a hydrogen atom or a group represented by —P(O)(OR4)(OR5), and at least one of R2 and R3 is a group represented by —P(O)(OR4)(OR5); and R4 and R5 are each independently a hydrogen atom or a linear or branched alkyl group of 2 to 5 carbon atoms.
本发明提供了一种具有高美白效果、安全性和稳定性优异的化合物,并提供了一种包含该化合物的皮肤外用制剂。本发明的化合物是由式(1)表示的4-烷基
间苯二酚衍
生物或其盐:其中,R1是具有3至7个碳原子的支链或环状烷基或具有2至5个碳原子的线性烷基;R2和R3各自独立地表示氢原子或由—P(O)(OR4)(OR5)表示的基团,且至少其中之一是由—P(O)(OR4)(OR5)表示的基团;R4和R5各自独立地表示氢原子或具有2至5个碳原子的线性或支链烷基。