Reacción #721752

Ecuación de reacción

hydroxy-indole

(2,3,3-trimethyl-3-H-indol-5-yl)-acetic acid

p-carboxymethylphenylhydrazine hydrochloride

1,1-bis(hydroxymethyl)propanone

→

(3,3-dihydroxymethyl2-methyl-3-H-indol-5-yl)-acetic acid

Disolventes

acetic acid

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaat reflux for 1

Procedimiento

The hydroxy-indole compound is readily prepared by literature method (P. L. Southwick, J. G. Cairns, L. A. Ernst, and A. S. Waggoner, One pot Fischer synthesis of (2,3,3-trimethyl-3-H-indol-5-yl)-acetic acid derivatives as intermediates for fluorescent biolabels. Org. Prep. Proced. Int. Briefs, 1988, 20(3), 279-284). Reaction of p-carboxymethylphenylhydrazine hydrochloride (30 mmol, 1 equiv.) and 1,1-bis(hydroxymethyl)propanone (45 mmole, 1.5 equiv.) in acetic acid (50 mL) at room temperature for 30 minutes and at reflux for 1 gives (3,3-dihydroxymethyl2-methyl-3-H-indol-5-yl)-acetic acid as a solid residue. The reaction of 3-bromopropyl-N,N-bis(carboxymethyl)amine, which was prepared as described in Example 5, with the intermediate indole and subsequent reaction of the indole intermediate with glutaconaldehyde dianil monohydrochloride (see Example 1) gives the desired product.

Fuente