CAS: 15475-27-1; Potassium,Diphenylphosphanide

上下游产品

triphenylphosphine (trimethylsilyl)diphenylphosphine diphenylphosphane chloro-diphenylphosphine2-diphenylphosphinoethanol (2-aminoethyl)diphenylphosphane γ-diphenylphosphinopropyl alcohol (2-phenylethyl)diphenylphosphane

专利信息

专利号:US-5654485-A
优先权日:1996-03-25
标题:Synthesis of cycloalkyldiarylphosphines
发明人：SENARATNE K PUSHPANANDA A; MALCOLM ARCELIO J; ORIHUELA FELIX M; ELNAGAR HASSAN Y
权利人:ALBEMARLE CORP
摘要:By reacting certain partially sterically-hindered chloro-substituted cycloalkanes with sodium and/or potassium diarylphosphides in an ether reaction medium, not only are useful cycloalkyldiarylphosphines produced, but in addition the chloro-substituted cycloalkane does not undergo any appreciable reaction with the coproduced aryl sodium and/or aryl potassium as it is formed. Moreover, the process makes it possible to avoid or at least to greatly reduce interaction with or cleavage of cyclic ether reaction media such as tetrahydrofuran. Thus the process makes possible improvements both in yield and quality of the cycloalkyldiarylphosphite product. A two-stage process conducted in an ether reaction medium is also described. In the first stage the sodium and/or potassium diarylphosphine reactant is produced by reaction between sodium and/or potassium and triarylphosphine.

专利号:US-6040461-A
优先权日:1998-05-14
标题:Synthesis of 3-epi vitamin D3 metabolites and analogs
发明人：BATCHO ANDREW DAVID; MANCHAND PERCY SARWOOD; USKOKOVIC MILAN RADOJE
权利人:HOFFMANN LA ROCHE; SYNTEX INC
摘要:The invention relates to a process for the preparation of vitamin D 3 compounds of formula I. ##STR1## Wherein A is a single or a double bond; B is a single, cis-double, trans double or a triple bond; R 1 and R 2 are independently hydrogen, a lower alkyl, e.g., a C 1 -C 4 alkyl; R 3 and R 4 are independently a lower alkyl, e.g., C 1 -C 4 alkyl, a hydroxyalkyl, and a haloalkyl, e.g., a fluoroalkyl; and X and Y are independently hydrogen or hydroxy in the case when B is a single or a double bond.

专利号:CA-2271414-A1
优先权日:1998-05-14
标题:Synthesis of 3-epi vitamin d3 metabolites and analogs

专利号:CA-2253304-A1
优先权日:1996-04-29
标题:Synthesis of cycloalkyldiarylphosphines

专利号:WO-9735865-A1
优先权日:1996-03-25
标 题:Synthesis of cycloalkyldiarylphosphines

专利号:WO-9741131-A1
优先权日:1996-04-29
标题 :Synthesis of cycloalkyldiarylphosphines