Title:
【発明の名称】メチレンビスホスホン酸類の製造方法
Document Type and Number:
Japanese Patent JP2835651
Kind Code:
B2
Abstract:
PCT No. PCT/FI90/00197 Sec. 371 Date Apr. 30, 1992 Sec. 102(e) Date Apr. 30, 1992 PCT Filed Aug. 15, 1990 PCT Pub. No. WO91/03480 PCT Pub. Date Mar. 21, 1991.The present invention concerns a novel process for the preparation of methylenebisphosphonic acids of the formula I (I) wherein Q1 and Q2 are independently hydrogen or halogen, by hydrolyzing the corresponding methylenebisphosphonic acid tetraester of the formula (II) wherein R has the meaning of a straight or branched alkyl group containing 1 to 4 carbon atoms, and Q1 and Q2 have the same meaning as above.
Inventors:
RANPII KURAUSU
NIEMINEN KAUKO
RUOHONEN JARUTSUKO
NIEMINEN KAUKO
RUOHONEN JARUTSUKO
Application Number:
JP51121590A
Publication Date:
December 14, 1998
Filing Date:
August 15, 1990
Export Citation:
Assignee:
REIRASU OY
International Classes:
C07F9/38; (IPC1-7): C07F9/38
Domestic Patent References:
| JP57154131A | ||||
| JP5942395A | ||||
| JP4927339B1 |
Other References:
【文献】米国特許4234645(US,A)
【文献】米国特許3683080(US,A)
【文献】米国特許3683080(US,A)
Attorney, Agent or Firm:
Koji Katagiri