Methyl iodide → HCID 15868955, compound

HRID 896757Notes

Reaction equation

[CH3:1][C:2]1([CH3:17])[C:10]2[C:5](=[C:6]3[CH:16]=[CH:15][CH:14]=[CH:13][C:7]3=[CH:8][C:9]=2[O:11][CH3:12])[NH:4][CH2:3]1.[CH3:18]I>>[CH3:18][N:4]1[C:5]2[C:10](=[C:9]([O:11][CH3:12])[CH:8]=[C:7]3[CH:13]=[CH:14][CH:15]=[CH:16][C:6]3=2)[C:2]([CH3:17])([CH3:1])[CH2:3]1

Participants

Reactant 2

HCID 6328Methyl iodide

HCID 15868954HCID 15868954, compound

Product 1

HCID 15868955HCID 15868955, compound

Procedure

A fifth preferred general synthesis method suitable for the synthesis of N-substituted-3,3-dimethyl-4-hydroxy-benzoindoline compounds, e.g N-methyl-3,3-dimethyl-4-hydroxy-benzoindoline 27, is also shown in FIG. 3. In this method, a 1-amino-3-methoxynapthalene 18 is acetylated with an acid chloride, e.g., 2-bromo-2-methylpropionyl chloride, to give compound 23. Compound 23 is cyclized by reaction with AlCl3 to give compound 24. Compound 24 is then reduced with LAH to give the 3,3-dimethyl-4-methoxybenzoindoline 25. Compound 25 is then alkylated with an alkylating agent, e.g., methyl iodide, to give a N-methyl-3,3-dimethyl-4-methoxybenzoindoline, e.g., compound 26. Subsequent methoxy group deprotection by with boron tribromide gives compound 27. An example of this synthesis is provided in Example 5 below.

Sources & evidence

ORD record: ord-d8140124d7ee43acadb99591ff0f55ec
Source dataset: uspto-grants-2005_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06919445B2

Reaction notes

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