Abstract:
This invention provides a new synthesis for norzearalane II and related compounds which related compounds and norzearalane II are represented by the formula
where X is an integer having a value from 1 to 13 inclusive. The anabolic agent norzearalane II, in which X 9 in the foregoing formula, is prepared by a total chemical synthesis involving the reaction of 10-undecenal with malonic acid to produce trans-2,12-tridecadienoic acid; treating the acid so formed with diazomethane to yield methyl trans-2,12tridecadienoate; reacting the methyl ester with ethyl acetoacetate and sodium ethoxide to form the sodium salt of ethyl 6-(9-decenyl)- Beta -dihydroresorcylate; brominating the dihydroresorcylate to prepare ethyl 3-bromo-6-(9-decenyl)- Beta dihydroresorcylate; de-hydrobrominating the foregoing bromo derivative to give ethyl 6-(9-decenyl)- Beta -resorcylate; reacting the resorcylate ester with benzyl chloride to produce ethyl 6-(9-decenyl)- Beta -resorcylate dibenzyl ether; subjecting the benzylated ester to the action of diborane, water and hydrogen peroxide to form ethyl 2,4-bis(benzyloxy)-6-(10hydroxydecyl)-benzoate; treating the foregoing benzoate with sodium ethoxide to prepare norzearalane II dibenzyl ether, and also to prepare as a by-product the dimeric dilactone of 2,4bis(benzyloxy)-6-(10-hydroxydecyl)-benzoic acid; hydrogenating norzearalane II dibenzyl ether to form norzearalane II.
Abstract translation:本发明提供了新月桂酸二异氰酸酯和相关化合物的新合成物,其中相关化合物和犹比达烷II由式OH O | PARALLEL C ANGLE O | CH 2 | ANGLE HO(CH 2)X表示,其中X是具有从1到 13包含
Abstract:
This application relates to 2-(5 carboxypentyl)-4, 6dimethoxybenzoic acid, to intermediates useful in its preparation, and to methods for its preparation.