(S)-3-[6-(6-Methoxy-5-methyl-pyridin-3-yl)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidin-4-yloxy]-pyrrolidine-1-carboxylic acid tert-butyl ester → 6-(6-methoxy-5-methyl-pyridin-3-yl)-4-((S)-pyrrolidin-3-yloxy)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidine

Participants

Reaction Steps

(S)-3-[6-(6-Methoxy-5-methyl-pyridin-3-yl)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidin-4-yloxy]-pyrrolidine-1-carboxylic acid tert-butyl ester (2.05 g, 4.63 mmol) was dissolved in TFA/CH2Cl2 (1/2) and stirred at rt for 1 h. The reaction mixture was concentrated under vacuum, the residue was diluted with CH2Cl2, the organic layer washed with NaOH 1N then brine, dried over Na2SO4, filtered and evaporated to give 6-(6-methoxy-5-methyl-pyridin-3-yl)-4-((S)-pyrrolidin-3-yloxy)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidine. 1H NMR (400 MHz, CDCl3, 298K) δ ppm 2.20-2.30 (m, 2 H), 2.22 (s, 3 H), 3.00-3.06 (t, 2 H), 3.09-3.18 (m, 1 H), 3.22-3.37 (m, 3 H), 3.45-3.50 (t, 2 H), 3.95 (s 3 H), 4.10 (s, 2 H), 4.20-4.65 (br.s 1 H), 5.63-5.69 (m, 1 H), 7.21-7.252 (m, 1 H), 7.70-7.74 (m, 1 H), 8.60 (s, 1 H). LCMS: [M+H]+=341.9, Rt(7)=0.61 min.

Provenance & Evidence