تفاعل #10404

معادلة التفاعل

{7-[(S)-3-(tert-butoxycarbonylamino)pyrrolidin-1-yl]-1-cyclopropyl-1,4-dihydro-2,4-dioxo-5,6,8-trifluoro-2H-quinazolin-3-yl}carbamic acid tert-butyl ester

triethylamine

benzylamine

→

{7-[(S)-3-(tert-butoxycarbonylamino)pyrrolidin-1-yl]-5-benzylamino-1-cyclopropyl-6,8-difluoro-1,4-dihydro-2,4-dioxo-2H-quinazolin-3-yl}carbamic acid tert-butyl ester

المردود 86.8%

المذيبات

dimethyl sulfoxide

ظروف التفاعل

المعالجة

1. 1
   تركيزThe mixture is concentrated under high vacuum
2. 2
   أخرىthe residue purified by column chromatography (1:2 ethyl acetate/hexanes)

الإجراء التجريبي

A solution of {7-[(S)-3-(tert-butoxycarbonylamino)pyrrolidin-1-yl]-1-cyclopropyl-1,4-dihydro-2,4-dioxo-5,6,8-trifluoro-2H-quinazolin-3-yl}carbamic acid tert-butyl ester from Example 8 (0.51 g, 0.914 mmol), triethylamine (1.3 mL, 9.3 mmol), and benzylamine (0.50 mL, 4.6 mmol) in dimethyl sulfoxide (7.5 mL) is heated at 100° C. for 16 hours in a sealed glass tube. The mixture is concentrated under high vacuum and the residue purified by column chromatography (1:2 ethyl acetate/hexanes) to afford {7-[(S)-3-(tert-butoxycarbonylamino)pyrrolidin-1-yl]-5-benzylamino-1-cyclopropyl-6,8-difluoro-1,4-dihydro-2,4-dioxo-2H-quinazolin-3-yl}carbamic acid tert-butyl ester as a solid (0.51 g). 1NMR (CDCl3): δ 8.50 (bs, 1H), 7.37–7.18 (m, 5H), 6.56 (bs, 1H), 4.76–4.62 (bd, 1H), 4.59–4.48 (m, 2H), 4.34–4.18 (m, 1H), 3.93–3.49 (m, 3H), 3.48–3.20 (m, 2H), 2.24–2.04 (m, 1H), 1.96–1.74 (m, 1H), 1.49 (s, 9H), 1.46 (s, 9H), 1.13–1.00 (m, 2H), 0.75–0.61 (m, 2H).

المصدر