Trifluoroacetic acid → 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

HRID 1965341Notes

Reaction equation

[C:1]1([CH:7]([C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)[N:8]2[C:16]3[CH:15]=[C:14]4[O:17][CH2:18][CH2:19][O:20][C:13]4=[CH:12][C:11]=3[C:10](O)([C:21]3[C:22]([OH:30])=[CH:23][C:24]4[O:28][CH2:27][CH2:26][C:25]=4[CH:29]=3)[C:9]2=[O:32])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C([SiH](CC)CC)C.FC(F)(F)C(O)=O>ClCCl>[C:33]1([CH:7]([C:1]2[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=2)[N:8]2[C:16]3[CH:15]=[C:14]4[O:17][CH2:18][CH2:19][O:20][C:13]4=[CH:12][C:11]=3[CH:10]([C:21]3[C:22]([OH:30])=[CH:23][C:24]4[O:28][CH2:27][CH2:26][C:25]=4[CH:29]=3)[C:9]2=[O:32])[CH:34]=[CH:35][CH:36]=[CH:37][CH:38]=1

Participants

Conditions

Temperature: 0 °C

Procedure

A mixture of 6-(diphenylmethyl)-8-hydroxy-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 (0.78 g, 1.5 mmol), triethylsilane (1.2 mL) and trifluoroacetic acid (1.2 mL) in dichloromethane (10 mL) was stirred at 0° C. for 1 h and then at ambient temperature for 1 h. The mixture was concentrated in vacuo to afford crude 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 (100%): MS (ES+) m/z 492.1 (M+1).

Workup

waitat ambient temperature for 1 h
concentrationThe mixture was concentrated in vacuo

Sources & evidence

ORD record: ord-a7d713d020f94cada253cf19abd7e7c9
Source dataset: uspto-grants-2013_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08415370B2

Reaction notes

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