- Turn-on fluorescence sensor for mono- and di-phosphonic acid derivatives using anthracene-based diamidine and its detection of amidinium-phosphonate and amidinium formation
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The fluorescence detection of di-phosphonic acid and mono-phosphonic acid derivatives using the anthracene-based diamidine 1 has been investigated. The diamidine 1 forms 1:1 and 1:2 complexes with the di-phosphonic acid and mono-phosphonic acid derivative
- Kusukawa, Takahiro,Nagano, Hitoshi,Nakaguchi, Keita,Takeshita, Shota,Harumoto, Yuya
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p. 465 - 476
(2018/01/03)
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- Branch-selective, Iridium-catalyzed hydroarylation of monosubstituted alkenes via a cooperative destabilization strategy
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Highly branch-selective, carbonyl-directed hydroarylations of monosubstituted alkenes are described. The chemistry relies upon a cationic Ir(I) catalyst modified with an electron deficient, wide bite angle bisphosphine ligand. This work provides a regioisomeric alternative to the Murai hydroarylation protocol.
- Crisenza, Giacomo E. M.,McCreanor, Niall G.,Bower, John F.
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supporting information
p. 10258 - 10261
(2014/08/05)
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- Flexible diphosphonic acids for the isolation of uranyl hybrids with heterometallic UVI = O - ZnII cation-cation interactions
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A family of uranyl diphosphonates have been hydrothermally synthesized using various flexible diphosphonic acids and Zn(UO2)(OAc) 4·7H2O in the presence of bipy or phen. Single-crystal X-ray analyses indicate that these compounds represent the first examples of uranyl phosphonates with heterometallic UVI = O - Zn II cation-cation interactions.
- Tian, Tao,Yang, Weiting,Wang, Hao,Dang, Song,Sun, Zhong-Ming
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supporting information
p. 8288 - 8290
(2013/09/02)
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- High yield synthesis of tetraethyl alkylenediphosphonates via the Michaelis-Arbuzov reaction
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A high-yield synthesis of tetraethyl alkylenediphosphonates was achieved via the Michaelis-Arbuzov reaction. Application of optimized reaction conditions for a series of homologous alkylenediphosphonates establishes the generality of the approach.
- Griffith, Julie A.,McCauley, David J.,Barrans Jr., Richard E.,Herlinger, Albert W.
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p. 4317 - 4323
(2007/10/03)
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- Medium-ring diphosphines from diphosphabicycloalkanes: stereoselective syntheses, structure and properties
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A series of 1,k+2-diphosphabicycloalkanes 2b-e are prepared by n-BuLi-promoted cyclisation of 1,ω-diphosphinoalkanes, followed by alkylation and cycloalkylation with 1,ω-dihaloalkanes.These compounds appear to be exclusively cis-isomers except 1,6-diphosphabicycloundecane 2e which is a 3:1 cis/trans mixture.Mono-quaternisation of cis-1,k+2-diphosphabicycloalkanes, followed by treatment of the mono-quaternary salts with alkyllithium or Grignard reagents produces cis-1,n-disubstituted-1,n-diphosphacycloalkanes 4 exclusively; examples containing 8-, 9- and 10-membered rings and a range of substituents on phosphorus are described.Di-quaternisation of 1,k+2-diphosphabicycloalkanes, followed by hydrolysis, yields the trans-isomers of 1,n-disubstituted-1,n-diphosphacycloalkane monooxides 6 exclusively; reduction of these with LiAlH4 in benzene gives largely trans-1,n-disubstituted-1,n-diphosphacycloalkanes 7, but is not completely stereoselective.The structure and properties of these diphosphacycloalkanes are discussed.He(I) photoelectron spectra of 1,5-diphosphabicyclooctane, 1,6-diphosphabicyclononane and 1,6-diphosphabicyclodecane show little evidence of interaction between phosphorus lone pairs, unlike the corresponding hydrazines.The medium-ring diphosphacycloalkanes, 1,5-dimethyl-1,5-diphosphacyclooctane and 1,6-dimethyl-1,6-diphosphacyclodecane also show little evidence of interaction between phosphorus lone pairs.
- Alder, Roger W.,Ganter, Christian,Gil, Michelle,Gleiter, Rolf,Harris, Christopher J.,et al.
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p. 1643 - 1656
(2007/10/03)
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