Реакция #2004665

Уравнение реакции

Thiolactam

(R)-2-Amino-7-(2-bromo-4-fluoro-phenyl)-4-methyl-7,8-dihydro-6H-pyrido[4,3-d]pyrimidine-5-thione

(R)—O-((1,4-dioxan-2-yl)methyl)hydroxylamine

→

(R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O—((R)-1,4-dioxan-2-yl)methyl oxime

Растворители

toluene

Условия реакции

Обработка

1. 1
   ФильтрацияThe crude mixture was filtered through Celite
2. 2
   Промывкаrinsed with methanol
3. 3
   Концентрированиеconcentrated
4. 4
   Другоеpurified on preparatory LC/MS (25-55% CH3CN in H2O)

Методика

Thiolactam (31I (Example 31), 0.087 g, 0.0272 mmol), (R)—O-((1,4-dioxan-2-yl)methyl)hydroxylamine (2M (Example 2-E), 0.145 g, 1.09 mmol), and mercury (II) acetate (0.173 g, 0.045 mmol) were dissolved in 3.5 mL of dry toluene and heated in 100° C. oil bath for 1 h. The reaction was done as judged by LC/MS. The crude mixture was filtered through Celite, rinsed with methanol and then concentrated and purified on preparatory LC/MS (25-55% CH3CN in H2O) to afford (R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O—((R)-1,4-dioxan-2-yl)methyl oxime (39A, 0.0405 g, 36.7% yield). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.90 (s, 3H) 3.04 (dd, J=17.05, 8.97 Hz, 2H) 3.28 (dd, J=17.56, 4.17 Hz, 1H) 3.43 (dd, J=11.62, 9.85 Hz, 1H) 3.58-3.68 (m, 1H) 3.70-3.76 (m, 2H) 3.77-3.88 (m, 2H) 3.93-4.00 (m, 1H) 4.01-4.08 (m, 1H) 4.09-4.18 (m, 1H) 5.01 (d, J=5.05 Hz, 1H) 5.78 (s, 1H) 7.11 (td, J=8.21, 2.53 Hz, 1H) 7.37 (dd, J=7.96, 2.65 Hz, 1H) 7.41 (dd, J=8.84, 5.81 Hz, 1H). ESI-MS: m/z 468.1 (M+H)+.

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