HCID 67771959, compound → HCID 67772293, compound

Participants

Reaction Steps

Following the preparation procedure of 22*, the acetylation of 10 afforded 21* with 89% yield. mp 144-145° C.; [α]D=−30.7 (c=2.5, CHCl3); 1H NMR (CDCl3, 400 MHz): δ 7.90 (d, J=8.7 Hz, 2H), 7.49 (d, J=8.5 Hz, 2H), 7.10 (d, J=8.5 Hz, 2 H), 7.08 (d, J=8.7 Hz, 2H), 6.74 (d, J=2.2 Hz, 2H), 6.59 (d, J=2.2 Hz, 2H), 5.64 (bs, 1H), 5.22 (s, 1 H), 3.12 (A of ABq, J=17.7, 4.4 Hz, 1H), 3.02 (B of ABq, J=17.7, 1.8 Hz, 1H), 2.28 (s, 6H), 2.27 (s, 3H), 2.25 (s, 3H); 13C NMR (CDCl3, 400 MHz): δ 169.1, 168.9, 168.7, 168.4, 164.8, 155.2, 154.4, 150.5, 149.7, 134.5, 131.2, 127.4, 126.9, 121.6, 109.7, 108.7, 108.0, 67.7, 26.2, 21.0, 20.7; HRMS (ESI) calcd for C30H26O11Na (M+Na) 585.1373. found 585.1371.

Provenance & Evidence