1-(diphenylmethyl)-3-(2-hydroxy-4-methoxy-5-methylphenyl)-1,3-dihydro-2H-indol-2-one → 6'-(diphenylmethyl)-2',3',5,6-tetrahydrospiro[benzo[1,2-b:5,4-b']difuran-3,8'-[1,4]dioxino[2,3-f]indol]-7'(6'H)-one

Participants

Reaction Steps

Following the procedure as described in EXAMPLE 2 and making non-critical variations using 6-(diphenylmethyl)-8-(6-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-2,3,6,8-tetrahydro-7H-[1,4]dioxino[2,3-f]indol-7-one to replace 1-(diphenylmethyl)-3-(2-hydroxy-4-methoxy-5-methylphenyl)-1,3-dihydro-2H-indol-2-one, 6′-(diphenylmethyl)-2′,3′,5,6-tetrahydrospiro[benzo[1,2-b:5,4-b′]difuran-3,8′-[1,4]dioxino[2,3-f]indol]-7′(6′H)-one was obtained (67%) as a colorless solid: MS (ES+) m/z 504.0 (M+1).

Provenance & Evidence