7-Fluoro-1,2,3,4-tetrahydronaphthalen-1-one → E-N-Cyclopropyl-2-(7-fluoro-1,2,3,4-tetrahydro-1-naphthylidene)acetamide

HRID 362844Notes

Reaction equation

HRID 362844 reaction equation
[F:1][C:2]1[CH:11]=[C:10]2[C:5]([CH2:6][CH2:7][CH2:8][C:9]2=O)=[CH:4][CH:3]=1.C(OP([CH2:21][C:22](=[O:27])[NH:23][CH:24]1[CH2:26][CH2:25]1)(=O)OCC)C>>[CH:24]1([NH:23][C:22](=[O:27])/[CH:21]=[C:9]2\[CH2:8][CH2:7][CH2:6][C:5]3[C:10]\2=[CH:11][C:2]([F:1])=[CH:3][CH:4]=3)[CH2:26][CH2:25]1

Participants

3

Reactant 2

HCID 103747647-Fluoro-1,2,3,4-tetrahydronaphthalen-1-oneHCID 54270018Diethyl [2-(cyclopropylamino)-2-oxoethyl]phosphonate

Product 1

HCID 69886926E-N-Cyclopropyl-2-(7-fluoro-1,2,3,4-tetrahydro-1-naphthylidene)acetamideYield 37%

Procedure

This compound was prepared in an analogous manner to Example 12f with the replacement of 5-fluoro1-tetralone and diethyl (cyclopropylcarbamoyl)methyl phosphonate with 7-fluoro-1-tetralone (7.76 g, 0.05 mol) and diethyl(cyclo propylcarbamoyl)methylphosphonate (11.1 g, 0.05 mol). Chromatography on Silica gel using ethyl acetate:hexanes (1:2) as eluent gave 4.38 g (37%) of (E)-N-Cyclopropyl-2-(7-fluoro-1,2,3,4-tetrahydro-1-naphthylidene) acetamide, m.p., 122.8°-123.3° C.; NMR (DMSO-d6): d 8.00 (d, J=4.0 Hz,1H), 7.32 (dd, J=11.2 Hz,1H), 7.04-7.23 (m, 2H), 6.33 (s, 1H), 3.06 (m,2H), 2.69 (m, 3H), 1.70 (m, 2H), 0.66 (m, 2H), 0.40 (m, 2H); steady-state nOe: irradiation at 6.39 d, observed significant nOe at 7.32 d.

Sources & evidence

ORD record
ord-3da589ff6d554f02930acb304d00fa1e
Source dataset
uspto-grants-1999_02
Patent number
US05872118

Reaction notes

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