HCID 59352339, compound → HCID 59352514, compound

Participants

Reaction Steps

1′-[(2S)-Tetrahydrofuran-2-ylmethyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one was resolved on chiral semi-prep HPLC IA column with tert-butylmethyl ether (100%) to afford (3R)-1′-[(2S)-tetrahydrofuran-2-ylmethyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one (64%): 1H NMR (300 MHz, CDCl3) δ7.32-6.98 (m, 4H), 6.47 (s, 1H), 6.38 (s, 1H), 4.77 (ABq, 2H), 4.51 (t, J=8.6 Hz, 2H), 4.31-4.21 (m, 1H), 3.98-3.64 (m, 4H), 3.05-2.88 (m, 2H), 2.09-1.64 (m, 4H); 13C NMR (75 MHz, CDCl3) δ 178.2, 161.7, 161.2, 142.8, 132.6, 128.6, 123.6, 123.2, 120.3, 119.8, 118.8, 109.4, 93.1, 80.6, 76.9, 72.3, 68.2, 57.6, 44.6, 29.2, 29.0, 25.5; MS (ES+) m/z 363.8 (M+1).

Provenance & Evidence