The invention discloses a rare-earth
metal arylamine group compound as well as preparation method and application thereof. The invention discloses the rare-earth
metal arylamine group compound which is characterized in that a general formula of the rare-earth
metal arylamine group compound is (2,6-R12PhNH)5LnLi2(THF)2, wherein Ln is a rear-earth metal selected from one of
neodymium,
samarium,
ytterbium or
yttrium; R1 is selected from one of
hydrogen, methyl or
isopropyl. The rare-earth metal arylamine group compound has the advantages that the rare-earth metal arylamine group compound has a definite structure; raw materials used in the preparation method are simple, easily obtained and cheap; the reaction process is simple and easily operated; the rare-earth metal arylamine group compound product is conveniently purified and the yield of the product is high; the rare-earth metal arylamine group compound has a
high activity when acting as a
single component catalyst to catalyze a
hydrogen phosphine reaction of
aldehyde or
ketone and
phosphite ester; the use amount of the catalyst is less; the yield is high; a substrate has wide universality; a new and simple method is provided for synthesis of a-hydroxyphosphonate.