Phosphorous ester compound, process for producing the same, and use thereof

摘要

A phosphorous ester compound of formula (I): wherein R¹ and R² independently represent hydrogen, C_1-8 alkyl, C_5-8 cycloalkyl, C_6-12 alkylcycloalkyl, C_7-12 aralkyl or phenyl, R³ represents hydrogen or C_1-8 alkyl, R⁴, R⁵, R⁶ and R⁷ independently represent hydrogen, C_1-8 alkyl, C_5-8 cycloalkyl, C_6-12 alkylcycloalkyl, C_7-12 aralkyl, phenyl, C_1-8 alkoxy, or halogen, provided that four R¹ groups are the same or different, four R² groups are the same or different, two R⁴ groups are the same or different, two R⁵ groups are the same or different, two R⁶ groups are the same or different, and two R⁷ groups are the same or different, X represents a single bond, sulfur, or -CHR⁸-, wherein R⁸ represents hydrogen, C_1-8 alkyl, or C_5-8 cycloalkyl, A represents a single bond, oxygen, etc.