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ChemicalBook CAS DataBase List Indole-3-carbinol

Indole-3-carbinol synthesis

13synthesis methods
Using indole, phosphorus oxychloride and N,N-dimethylformamide as raw materials, indole-3-carbaldehyde was synthesized by Vilsmeier-Haack reaction with a yield of 87.1%.
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Yield:700-06-1 95.2%

Reaction Conditions:

with sodium tetrahydridoborate in ethanol at 20 - 45; for 2 h;Green chemistry;Temperature;

Steps:

1.S2-1.S3; 8-10 S2, preparation of crude indole-3-methanol

Take 100 g of indole-3-carboxaldehyde in a 1000 mL three-necked flask, add 200 g of ethanol, stir, disperse and dissolve at room temperature, then add 45 g of sodium borohydride, slowly heat up to 45 ° C, react for 2 hours, HPLC traces and detects no raw material indole-3 -formaldehyde, then filtered, the filter cake was sodium metaborate, sodium metaborate was collected, and the filtrate was concentrated to obtain crude indole-3-methanol.S3. PurificationThe crude indole-3-methanol obtained in S2 was recrystallized from ethanol to obtain purified indole-3-methanol with a yield of 95.2% and a purity of more than 99.0%. The purity analysis results are shown in Figure 2.

References:

CN113845463,2021,A Location in patent:Paragraph 0030-0031; 0035-0038; 0051-0058; 0063-0066

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