(3-hydroxyphenyl)boronic Acid → (3R,4S)-1-(4-fluorophenyl)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-4-(3'-hydroxybiphenyl-3-yl)azetidin-2-one

Participants

Reaction Steps

(3R,4S)-4-(3-Bromophenyl)-1-(4-fluorophenyl)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]azetidin-2-one (43 mg, 0.091 mmol) was coupled with 3-hydroxyphenyl boronic acid (18 mg, 0.13 mmol) under standard Suzuki conditions illustrated by Example 42. Purified by chromatography (silica gel, 10% to 90% ethyl acetate-hexane) to afford (3R,4S)-1-(4-fluorophenyl)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-4-(3′-hydroxybiphenyl-3-yl)azetidin-2-one (19.7 mg, 45% yield); Rf 0.30 (1:1 ethyl acetate-hexane); 1H NMR (300 MHz, CDCl3) δ 7.57-7.40 (m, 3H), 7.34-7.22 (m, 6H), 7.10 (ddd, 7.7, 1.6, 0.9 Hz 1H), 7.04-6.90 (m, 5H), 6.84 (ddd, J=8.2, 2.6, 0.9 Hz, 1H), 5.10 (br s, 1H), 4.72 (t, J=5.9 Hz, 1H), 4.67 (d, J=2.4 Hz, 1H), 3.16 (ddd, J=5.0, 2.6, 2.4 Hz, 1H), 2.26 (br s, 1H), 2.08-1.88 (m, 4H) ppm.

Provenance & Evidence