Reacción #70110

Ecuación de reacción

2-(4-oxiran-2-ylbutyl)oxirane

potassium hydroxide

5-acetylamino-N,N′-bis-(2,3-dihydroxypropyl)-2,4,6-triiodo-N,N′-dimethyl isophthalamide

HCl

boric acid

→

5,5′-(2,7-dihydroxyoctane-1,8-diyl)bis(acetylazanediyl)bis(N1,N3-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-N1,N3-dimethylisophthalamide)

Disolventes

acetonitrile

water

water methanol

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.WAITThe reaction was left over weekend
2. 2
   OtroSalts were removed by treatment with ion exchanger AMB200C and IRA67
3. 3
   FiltraciónThe solution was filtered from the resin
4. 4
   Otroevaporated
5. 5
   OtroAn aliquot of the crude material was purified by preparative HPLC (column Phenomenex Luna C18(2) 10 μm 250×50.0 mm, solvents
6. 6
   Otrowas obtained in 393 mg after lyophilisation
7. 7
   workup.WAITgradient 0-30% B over 20 min
8. 8
   Otrogave one broad peak centred at 14.77 minutes with m/z 1692.6 (MH+) corresponding to the structure

Procedimiento

To a stirred solution of water/methanol (4.9 ml, 2.5 ml) and potassium hydroxide (0.47 g, 8.4 mmol) at 40° C. was added 5-acetylamino-N,N′-bis-(2,3-dihydroxypropyl)-2,4,6-triiodo-N,N′-dimethyl isophthalamide (5.0 g, 6.5 mmol). To the clear solution was then added boric acid (0.28 g, 4.5 mmol). The mixture was cooled to room temperature and pH adjusted to 12.6. 2-(4-oxiran-2-ylbutyl)oxirane (0.315 g, 2.22 mmol) was added. The pH of the solution was adjusted to the interval 12.6-13. The reaction was left over weekend. To the solution was added HCl (18%) to pH 4. Salts were removed by treatment with ion exchanger AMB200C and IRA67. The solution was filtered from the resin and evaporated. An aliquot of the crude material was purified by preparative HPLC (column Phenomenex Luna C18(2) 10 μm 250×50.0 mm, solvents: A=water and B=acetonitrile; gradient 10-18% B over 60 min; flow 50.0 ml/min, UV detection at 214 nm and 254 nm), the product was obtained in 393 mg after lyophilisation. Analysis by LC-MS (column Agilent Zorbax SB-Aq 3.5 μm 3.0×100 mm, solvents: A=water/0.1% formic acid and B=acetonitrile/0.1% formic acid; gradient 0-30% B over 20 min; flow 0.3 ml/min, UV detection at 214 and 254 nm, ESI-MS) gave one broad peak centred at 14.77 minutes with m/z 1692.6 (MH+) corresponding to the structure.

Fuente