tert-Butyl methyl ether → HCID 59352290, compound

Participants

Reaction Steps

1′-[(2R)-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 99% tert-butylmethyl ether and 1% acetonitrile to afford (3S)-1′-[(2R)-tetrahydrofuran-2-ylmethyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one (66%): 1H NMR (300 MHz, CDCl3) δ7.34-6.97 (m, 4H), 6.48 (s, 1H), 6.38 (s, 1H), 4.77 (ABq, 2H), 4.50 (t, J=8.6 Hz, 2H), 4.32-4.21 (m, 1H), 3.92-3.68 (m, 4H), 2.96 (t, J=8.4 Hz, 2H), 2.10-1.64 (m, 4H); 13C NMR (75 MHz, CDCl3) δ 178.2, 161.7, 161.2, 142.8, 132.7, 128.6, 123.6, 123.2, 120.4, 119.8, 118.9, 109.5, 93.1, 80.7, 76.8, 72.3, 68.1, 57.6, 44.5, 29.0, 29.0, 25.6; MS (ES+) m/z 363.8 (M+1).

Provenance & Evidence