Реакция #6340

Уравнение реакции

4-chloro-6-[2-(diethoxyphosphorylmethoxy) ethoxyamino]-2,5-diformamidopyrimidine

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title compound

Выход 90.0%

6-Chloro-9-[2-(diethoxyphosphorylmethoxy)ethoxy]-2-formamidopurine

Выход 90.0%

Растворители

diethoxymethyl acetate

Условия реакции

Обработка

1. 1
   Другоеexcess solvent was removed under reduced pressure
2. 2
   workup.DISSOLUTIONthe residue dissolved in methanol (20 ml)
3. 3
   ДругоеThe solvent was evaporated
4. 4
   Другоеto leave an oil which
5. 5
   Другоеwas chromatographed on silica gel (eluted with dichloromethane: methanol, 98.2)

Методика

A solution of 4-chloro-6-[2-(diethoxyphosphorylmethoxy) ethoxyamino]-2,5-diformamidopyrimidine (2.8 g, 6.6 mmol) in diethoxymethyl acetate (20 ml) was heated at 120° C. for 2 hours. After cooling to ambient temperature, excess solvent was removed under reduced pressure, the residue dissolved in methanol (20 ml) and 0.880 ammonia (6.5 ml) and the solution stirred at ambient temperature for 1 hour. The solvent was evaporated to leave an oil which was chromatographed on silica gel (eluted with dichloromethane: methanol, 98.2) to give the title compound as a pale yellow oil (2.4 g, 90%). IR: νmax (film) 3480, 3120, 2995, 1710, 1610, 1580, 1510, 1440, 1390, 1330, 1240, 1050, 1030, 970, 920, 780 cm-1 ; 1H NMR δH [(CD3)2SO] 1.23 (6H, t, J=7 Hz, (OCH2CH3)2), 3.87 (2H, d, J=8 Hz, OCH 2P), 3.87 (2H, m, N-OCH2CH2), 4.03 (4H, m, (OCH2CH3)2), 4.56 (2H, m, N-OCH2CH2), 8.75 (1H, s, H-8), 9.38 (1H, br.s, CHO), 11.30 (1H, br.s, D2O exchangeable NHCHO). Found: C, 38.19; H, 4.79; N, 16.74%. C13H19N5O6PCl requires: C, 38.29; H, 4.70; N, 17.17%. Found: m/z 408.0827 (MH+). C13H20N5O6PCl requires: m/z 408.0840 (MH+).

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