US 5,142,098 A · Methylidenemalonate esters derived from esters of 9,10-endoethano-9,10-dihydroanthracane-11,11-dicarboxylic acid

Abstract

The invention relates to novel monoesters and diesters of 9,10-endoethano-9,10-dihydroanthracene-11,11-dicarboxylic acid. These novel monoesters and diesters correspond to the following structural chemical formula (II): ##STR1## in which R.sup.1 and R.sup.2 are identical or different and can represent H, an alkali metal or alkaline earth metal atom, a linear or branched alkyl group having from 1 to 6 carbon atoms, an alicyclic group having form 3 to 6 carbon atoms, an alkenyl group having from 2 to 6 carbon atoms, defined in their cis or trans variety, or an alkynyl group having from 2 to 6 carbon atoms, the said groups optionally being substituted by one or more functional groups such as ether, epoxide, halogeno, cyano, ester, aldehyde, ketone, aryl etc., where R.sup.1 and R.sup.2 cannot be H or ethyl simultaneously. These addition products constitute valuable intermediates for the preparation of methylidenemalonates in high yields and with a high purity.

Claims13

Dependent claims

An asymmetrical methylidenemalonate diester of the following structural chemical formula (Ia):

wherein R.sup.1 and R' each represent a lower alkyl having from 1 to 5 carbon atoms, and n is an integer from 1 to 5 inclusive.

The compound selected from the group consisting of:

11,11-di-n-propoxycarbonyl-9,10-endoethano-9,10-dihydroanthracene,
11,11-d-n-butoxycarbonyl-9,10-endoethano-9,10-dihydroanthracen,
11-n-butoxycarbonyl-11-n-pentoxycarbonyl-9,10-endoethane-9,10-dihydroanthra cene,
11-ethoxycarbonyl-11-ethoxycarbonylmethyleneoxycarbonyl-9,10-endoethano-9,1 0-dihydroanthracene,
11,11-dimethoxycarbonyl-9,10-endoethano-9,10-dihydroanthracene,
11-methoxycarbonyl-11-n-butoxycarbonyl-9,10-endoethano-9,10-dihydroanthrace ne,
11-methoxycarbonyl-11-n-hexyloxycarbonyl-9,10-endoethano-9,10-dihydroanthra cene,
11-methoxycarbonyl-11-benzyloxycarbonyl-9,10-endoethano-9,10-dihydroanthrac ene,
11,11-diethoxycarbonyl-9,10-endoethano-9,10-dihydroanthracene,
11-ethoxycarbonyl-11-n-propoxycarbonyl-9,10-endoethano-9,10-dihydranthracen e,
11-ethoxycarbonyl-11-n-butoxycarbonyl-9,10-endoethano-9,10-dihydroanthracen e,
11-ethoxycarbonyl-11-allyloxycarbonyl-9,10-endoethano-9,10-dihydroanthracen e,
11-ethoxycarbonyl-11-prop-2-ynyloxycarbonyl-9,10-endoethano-9,10-dihydroant hracene,
11-ethoxycarbonyl-11-methoxymethoxycarbonyl-9,10-endoethano-9,10-dihydroant hracene,
11-ethoxycarbonyl-11-ethoxyethoxycarbonyl-9,10-endoethano-9,10-dihydroanthr acene,
11-ethoxycarbonyl-11-ethoxycarbonyl propyleneoxycarbonyl 9,10-endoethano-9,10-dichydroanthracene,
11-ethoxycarbonyl-11-(2',3'-epoxypropoxycarbonyl)-9,10-endoethano-9,10-dihy droanthracene,
11-ethoxycarbonyl-11-propane-3-olyloxycarbonyl-9,10-endoethano-9,10-dihydro anthracene,
11-n-propoxycarbonyl-22-n-butoxycarbonyl-9,20-endoethano-9,10-dihydroanthra cene,
11,11-diisopropoxycarbonyl-9,10-endoethano-9,10-dihydroanthracene,
11,11-diisobutoxycarbonyl-9,10-endoethano-9,10-dihydroanthracene,
11. 11-di-n-pentoxycarbonyl-9,10-endoethano-9,10-dihydroanthracene,
11,11-diallyloxycarbonyl-9,10-endoethano-9,10-dihydroanthracene,
11,11-trimethylidene-1',3'-dioxycarbonyl-9,10-endoethano-9,10-dihydroanthra cene, and
11-methoxycarbonyl-11-methoxycarbonyl methylene oxycarbonyl-9,10-endoethane-9,10-dihydroanthracene.

22 more elements

Dependencies are inferred from the claim text.

Methylidenemalonate esters derived from esters of 9,10-endoethano-9,10-dihydroanthracane-11,11-dicarboxylic acid

Life of this patent

Methylidenemalonate esters derived from esters of 9,10-endoethano-9,10-dihydroanthracane-11,11-dicarboxylic acid

Life of this patent

Abstract

Claims13