公开(公告)号：KR870001523B1

公开(公告)日：1987-08-22

申请号：KR820000373

申请日：1982-01-29

Applicant: TAKEDA PHARMACEUTICAL

Inventor： OKADA YOSHIYUKI ,  INOUE YOSHIHIRO ,  IWANAKA KOICHI

IPC: C07F9/6503 ,  A01N57/16 ,  C07F9/645 ,  C07F9/6506 ,  C07F9/6509 ,  C07F9/65 ,  C07F9/141

Abstract: 4-Pyrazolyl phosphates (I; R=alkyl; Y=alkyl-or halogensubstd. ph) are prepd. by the reaction of 4-hydroxypyrazole derivs. of formula(II) and phosphinic acid trialkylester. Thus, 99.7g phosphinic acid triethyl is reacted with 19.4g 1-(4-chlorophenyl)4-hydroxypyrazole at 160≦̸C for 7hr to give 31.7g 0-[1-(4chlorophenyl)-pyrazole-4-yl -0, 0- diethyl phosphinic acid ester.