123355-55-5Relevant academic research and scientific papers
1,2-Diacetals in synthesis: Total synthesis of a glycosylphosphatidylinositol anchor of Trypanosoma brucei
Baeschlin, Daniel K.,Chaperon, Andre R.,Green, Luke G.,Hahn, Michael G.,Ince, Stuart J.,Ley, Steven V.
, p. 172 - 186 (2007/10/03)
A full account on a total synthesis of GPI anchor 1 employing butanediacetal (BDA) groups and a chiral bis(dihydropyran) is presented. The reactivity of selenium and thio glycosides was tuned by the use of BDA groups. This allowed the assembly of an appro
Synthesis of the enantiomers of myo-inositol 1,2,4,5-tetrakisphosphate, a regioisomer of myo-inositol 1,3,4,5-tetrakisphosphate
Mills, Stephen J.,Potter, Barry V. L.
, p. 1279 - 1286 (2007/10/03)
Routes for the synthesis of racemic myo-inositol 1,2,4,5-tetrakisphosphate DL-Ins(1,2,4,5)P4 5ab and the chiral antipodes D- and L-myo-inositol 1,2,4,5-tetrakisphosphate 5a and 5b, respectively, are described. For the synthesis of racemate 5ab, 3,6-di-O-benzoyl-1,2:4,5-di-O-isopropylidene-myo-inositol 7ab is prepared in two steps from myo-inositol. The ketals are hydrolysed under acidic conditions to give DL-1,4-di-O-benzoyl-myo-inositol 8ab. Phosphitylation of compounds 8ab using chloro(diethoxy)-phosphine in the presence of base, followed by oxidation and a three-step deprotection strategy, gives DL-Ins(1,2,4,5)P4 5ab. The chiral tetrakisphosphates 5a and 5b are synthesized using a different route. The 4,5-isopropylidene group of DL-3,6-di-O-benzyl-1,2:4,5-di-O-isopropylidene-myo-inositol 13ab are selectively removed under mild acidic conditions to give diol 14ab. p-Methoxybenzylation at the 4,5-positions followed by acid hydrolysis of the cis-isopropylidene ketal affords cis-diol 16ab. Selective coupling of (S)-(+)-O-acetylmandelic acid with diol 16ab at the equatorial hydroxy group provides two diastereoisomers 18 and 19, which are separated by chromatography. Basic hydrolysis of the individual diastereoisomers provides the enantiomers 16a and 16b. Acidic hydrolysis gives D- and L-3,6-di-O-benzyl-myo-inositol 20a and 20b, respectively. Phosphitylation and oxidation of tetraols 20a and 20b gives the fully blocked derivatives, which are deprotected to give tetrakisphosphates 5a and 5b, respectively. The absolute configuration of compound 20a is established by a chemical method. DL-1,2:4,5-Di-O-isopropylidene-myo-inositol 12ab is coupled to (S)-(+)-O-acetylmandelic acid to give a mixture of bis-esters 26 and 27 and crystallisation of the mixture of diastereoisomers affords pure isomer 27. Basic hydrolysis gives the pure enantiomer 12a (for which the absolute configuration is known) and benzylation followed by acid hydrolysis gives tetraol 20a with the same physical properties as compound 20a prepared by a different route described previously. D-Ins(1,2,4,5)P4 5a is a potent mobiliser of intracellular Ca2+ ions in permeabilised platelets, while L-Ins(1,2,4,5)P4 5b is inactive.
Practical divergent synthesis of all possible regioisomers of myo-inositol trisphosphates
Chung, Sung-Kee,Chang, Young-Tae,Sohn, Kwang-Hoon
, p. 163 - 164 (2007/10/03)
The synthesis of all possible 12 regioisomers of IP3, some of which are implicated as second messengers in cellular signalling, is accomplished from myo-inositol via its tribenzoate derivatives (IBz3) as the key intermediates.
Synthesis of All Possible Regioisomers of myo-Inositol Tetrakisphosphates
Chung, Sung-Kee,Chang, Young-Tae
, p. 11 - 12 (2007/10/02)
Synthesis of all possible nine regioisomers of IP4, some of which are implicated as second messengers in the cellular signalling, was accomplished from myo-inositol via its dibenzoate derivatives (IBz2) as the key intermediates; base-catalysed isomerization of readily available I(1,4)Bz2 and its derivatives, followed by suitable separation procedures efficiently provided all nine regioisomers of IBz2.
Base-catalysed Acyl Migrations in myo-Inositol Dibenzoates
Chung, Sung-Kee,Chang, Young-Tae
, p. 13 - 14 (2007/10/02)
Base-catalysed isomerizations of readily available I(1,4)Bz2 and its derivatives efficiently provided all nine regioisomers of IBz2 and the kinetic behaviour of the benzoyl-migration has been studied.
Highly Efficient Protection by the Tetraisopropyldisiloxane-1,3-diyl Group in the Synthesis of myo-Inositol Phosphates as Inositol 1,3,4,6-tetrakisphosphate
Watanabe, Yutaka,Mitani, Motohiro,Morita, Takao,Ozaki, Shoichiro
, p. 482 - 483 (2007/10/02)
Regioselective introduction of the tetraisopropyldisiloxane-1,3-diyl group onto myo-inositol and 1,2-O-cyclohexylidene-myo-inositol realised the efficient synthesis of various myo-inositol phosphates.
