CAS: 7782-87-8; Potassium Hypophosphite

专利信息

专利号:US-6717007-B1
优先权日:1999-09-16
标 题:Regiospecific synthesis of phosphonous acids
发明人：DUBEY SUSHIL KUMAR; RAJGOPAL VENKAT; SINGH ANIL VIR; LAHIRI SASWATA; WANI MUKESH JAGANNATH
权利人:LUPIN LTD
摘要:An improved regiospecific synthesis of organic phosphonous acids, comprising of hydrophosphorylation of an olefin with hydrophosphorous acid in the presence of an inorganic persulfate, which acts as a source of free radicals at a pH ranging from 4.5 to 7.0, in which the orientation of addition is anti-Markonikoff. The process enables production of organic phosphonous acids at lower temperature and atmospheric pressure under milder pH conditions for better regioselectivity in hydrophosphorylation and obtain the phosphonous acid with good yield and purity following simple isolation procedure. Phosphonous acids obtained by the process are commercially valuable as effective detergents and wetting agents, lubricants and lubricant additives, plasticizers for plastics and resins, corrosion inhibitors, chemicals including insecticides and pesticides, cobalt extractants and as key intermediates for preparation of commercially important angiotensin converting enzyme (ACE) inhibitors.

专利号:US-4632741-A
优先权日:1984-09-06
标 题 :Synthesis of alkyl phosphinate salts and bis(alkyl) phosphinate salts
发明人：WOLF STEPHEN F; LIU CHUNG-TSING
权利人:ECONOMICS LAB
摘要:An improved method for the preparation of phosphinate salts or bis(alkyl) phosphinate salts by the reaction of an olefinic material with a hypophosphite salt by means of irradiation with UV light in the presence of a photoinitiator is disclosed.

专利号:US-4590014-A
优先权日:1984-09-06
标 题:Synthesis of alkyl phosphinate salts
发明人：WOLF STEPHEN F; LIU CHUNG-TSING
权利人:ECONOMICS LAB
摘要:An improved method for the preparation of alkali metal phosphinate salts by the reaction of an olefinic material with an alkali metal hypophosphite in the presence of a free radical source is disclosed.

专利号:US-5288882-A
优先权日:1992-12-21
标题:Process for recovering an optically active epoxy alcohol
发明人：SHIH T THOMAS; SHUM WILFRED P-S
权利人:ARCO CHEM TECH
摘要:A method of recovering optically active epoxy alcohols from asymmetric epoxidation reaction mixture is provided whereby the epoxy alcohol may be obtained in high yield with minimal degradation of optical purity. The process is also suitable for the synthesis of useful organic sulfonate derivatives of chiral epoxy alcohols.

专利号:US-4814500-A
优先权日:1986-09-01
标 题:Cyanoguanidine derivative and process for preparation thereof
发明人：KIHARA NORIAKI; MUKAIYAMA TERUAKI; ISHITOKU TAKESHI; TAKAHASHI KATSUYA
权利人:MITSUI PETROCHEMICAL IND
摘要:A novel cyanoguanidine derivative represented by the following general formula (I): ##STR1## wherein X stands for a hydrogen atom, a chlorine atom or a bromine atom, and R stands for a lower alkyl group, is an effective precursor for the synthesis of N-cyano-N'-methyl-N'-(2-(5-methyl-4-imidazolylmethylthio(ethyl)-guanidine (Cimetidine) which has an action of controlling secretion of gastric acid and is valuable as an agent for the remedy of a gastric ulcer. n This cyanoguanidine derivative is prepared by reacting a methylvinylketone derivative with a mercaptoguanidine derivative or by reacting an amidinoketone derivative with a halogenating agent.

专利号:JP-2007510698-A
优先权日:2003-11-05
标题:Direct synthesis of alkylhalosilanes