(S)-1-(5-tert-butylisoxazol-3-yl)-3-(3-(6-methoxy-7-(pyrrolidin-3-yloxy)quinazolin-4-yloxy)phenyl)urea dihydrochloride → (R)-1-(5-tert-butylisoxazol-3-yl)-3-(3-(6-methoxy-7-(pyrrolidin-3-yloxy)quinazolin-4-yloxy)phenyl)urea dihydrochloride

Participants

Reaction Steps

Prepared from (R)-tert-butyl 3-(4-(3-(3-(5-tert-butylisoxazol-3-yl)ureido)phenoxy)-6-methoxyquinazolin-7-yloxy)pyrrolidine-1-carboxylate from the previous step (109 mg, 0.176 mmol) according to the procedure described for (S)-1-(5-tert-butylisoxazol-3-yl)-3-(3-(6-methoxy-7-(pyrrolidin-3-yloxy)quinazolin-4-yloxy)phenyl)urea dihydrochloride in Example 96B to afford (R)-1-(5-tert-butylisoxazol-3-yl)-3-(3-(6-methoxy-7-(pyrrolidin-3-yloxy)quinazolin-4-yloxy)phenyl)urea dihydrochloride as a colorless solid (42 mg, 40%). 1H NMR (300 MHz, CDCl3) δ 9.30 (brs, 1H), 8.61 (brs, 1H), 7.65 (s, 1H), 7.52 (s, 1H), 7.20-7.40 (m, 4H), 6.99 (m, 1H), 6.02 (s, 1H), 5.05 (m, 1H), 4.01 (s, 3H), 3.10-3.40 (m, 2H), 3.00 (m, 1H), 2.00-2.40 (m, 4H), 1.40 (s, 9H); LC-MS (ESI) m/z 519 (M+H)+.

Provenance & Evidence