- Synthesis and biological evaluation of phosphatidylinositol phosphate affinity probes
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The synthesis of the complete family of phosphatidylinositol phosphate analogues (PIPs) from five key core intermediates A-E is described. These core compounds were obtained from myo-inositol orthoformate 1 via regioselective DIBAL-H and trimethylaluminium-mediated cleavages and a resolution-protection process using camphor acetals 10. Coupling of cores A-E with phosphoramidites 34 and 38, derived from the requisite protected lipid side chains, afforded the fully-protected PIPs. Removal of the remaining protecting groups was achieved via hydrogenolysis using palladium black or palladium hydroxide on carbon in the presence of sodium bicarbonate to afford the complete family of dipalmitoyl- and amino-PIP analogues 42, 45, 50, 51, 58, 59, 67, 68, 76, 77, 82, 83, 92, 93, 99 and 100. Investigations using affinity probes incorporating these compounds have identified novel proteins involved in the PI3K intracellular signalling network and have allowed a comprehensive proteomic analysis of phosphoinositide interacting proteins. The Royal Society of Chemistry 2010.
- Conway, Stuart J.,Gardiner, James,Grove, Simon J. A.,Johns, Melloney K.,Lim, Ze-Yi,Painter, Gavin F.,Robinson, Diane E. J. E.,Schieber, Christine,Thuring, Jan W.,Wong, Leon S.-M.,Yin, Meng-Xin,Burgess, Antony W.,Catimel, Bruno,Hawkins, Phillip T.,Ktistakis, Nicholas T.,Stephens, Leonard R.,Holmes, Andrew B.
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scheme or table
p. 66 - 76
(2010/04/29)
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- Preparation of L-α-phosphatidyl-D-myo-inositol 3-phosphate (3-PIP) and 3,5-biphosphate (3,5-PIP2)
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Practical, asymmetric total syntheses of the title phospholipids from a readily available myo-inositol derivative as well as short chain and cross-linkable aminoether analogues are described. (C) 2000 Elsevier Science Ltd. All rights reserved.
- Falck,Krishna, U. Murali,Capdevila, Jorge H.
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p. 1711 - 1713
(2007/10/03)
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- General synthesis of 3-phosphorylated mj'o-inositol phospholipids and derivatives
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The D-3-phosphorylated wyo-inositol phospholipids PtdIns(3)P, PtdIns(3,4)P2, PtdIns(3,4,5)P3 and PtdIns(3,5)P2 were synthesised from /yo-inositol orthoformate 8. Key transformations included the regioselective DIBAL- and trimethylaluminium-mediated cleavages of wiyo-inositol orthoformate intermediates and a resolution-protection protocol using the camphor acetals 17. The final reductive debenzylation was effected with Pearlman's catalyst [Pd(OH)J in the presence of sodium hydrogen carbonate. The biological properties of the phospholipids were evaluated against various protein kinases (PKB and PDK-1) in which they played an important activation role.
- Painter, Gavin F.,Grove, Simon J. A.,Gilbert, Lan H.,Holmes, Andrew B.,Raithby, Paul R.,Hill, Malcolm L.,Hawking, Phillip T.,Stephens, Leonard R.
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p. 923 - 935
(2007/10/03)
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- L-α-phosphatidyl-D-myo-inositol 3,5-bisphosphate: Total synthesis of a new inositol phospholipid via myo-inositol orthoacetate
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The synthesis from myo-inositol of a newly-discovered inositol phospholipid, phosphatidylinositol 3,5-bisphosphate [PtdIns(3,5)P2], is described. The synthetic strategy, employing inter alia, a trimethylaluminium-mediated regioselective cleavage of a protected myo- inositol orthoacetate followed by an optical resolution using (R)-(-)-5-oxo- 2-tetrahydrofurancarboxylate esters, allows rapid access to dipalmitoyl PtdIns(3,5)P2.
- Riley, Andrew M.,Potter, Barry V.L.
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p. 6769 - 6772
(2007/10/03)
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