An object is to provide a method for producing a compound which is useful as a synthetic intermediate for an active pharmaceutical ingredient of an antidiabetic drug or the like in an industrially inexpensive and efficient manner, and the present invention can achieve the object by reducing a compound (2) represented by the following formula (2):
wherein R
1
, Ar, n and X are as mentioned herein in the presence of a titanium compound by using a reducing agent to produce a compound (1) represented by the following formula (1):
wherein R
1
, Ar and n are the same as defined above.
本发明的目的是以一种工业上廉价高效的方式提供一种合成中间体化合物,该化合物可用于抗糖尿病药物或类似药物的活性药物成分。通过在
钛化合物的存在下使用还原剂将由以下公式(2)表示的化合物(2)还原,本发明可以实现该目标,从而产生由以下公式(1)表示的化合物(1):其中R1,Ar,n和X如上所述,而R1,Ar和n的定义与上述相同。