2-fluoro-4-hydroxy-5-[1-(4-methoxybenzyl)-2-oxo-2,3-dihydro-1H-indol-3-yl]benzonitrile → 1'-(diphenylmethyl)spiro[furo[2,3-g]quinoxaline-8,3'-indol]-2'(1'H)-one

Participants

Reaction Steps

Following the procedure as described in EXAMPLE 2.40 and making non-critical variations using 1-(diphenylmethyl)-3-(7-hydroxyquinoxalin-6-yl)-1,3-dihydro-2H-indol-2-one to replace 2-fluoro-4-hydroxy-5-[1-(4-methoxybenzyl)-2-oxo-2,3-dihydro-1H-indol-3-yl]benzonitrile, 1′-(diphenylmethyl)spiro[furo[2,3-g]quinoxaline-8,3′-indol]-2′(1′H)-one was obtained (34%): 1H NMR (300 MHz, CDCl3) δ 8.57 (d, J=1.5 Hz, 1H), 8.46 (d, J=1.5 Hz, 1H), 8.07-8.04 (m, 1H), 7.63-6.86 (m, 15H), 6.55-6.52 (m, 1H), 5.10 (ABq, 2H).

Provenance & Evidence