7-Oxabicycloheptane and 7-oxabicycloheptene compounds

A compound having the structural formula ##STR53## and including all stereoisomers thereof;

• wherein A and B may be the same or different and A is CH.dbd.CH or (CH.sub.2).sub.2,
• B is CH.dbd.CH, C.tbd.C, or (CH.sub.2).sub.2 ;
• m is 1 to 8;
• X is CO.sub.2 R.sup.1 wherein R.sup.1 is H or lower alkyl;
• Y is aryl-lower alkyl;
• alkenyl containing 3 to 6 carbons;
• alkynyl containing 3 to 6 carbons;
• cycloalkyl;
• substituted cycloalkyl, cycloalkylalkyl, substituted cycloalkylalkyl or phenoxymethyl;
• wherein alkyl or lower alkyl by itself or as part of another group contains 1 to 12 carbons and may include as substituents halo, lower alkoxy, alkyl-aryl, haloalkyl, cycloalkyl or alkylcycloalkyl;
• cycloalkyl by itself or as part of another group contains 3 to 12 carbons in the ring portion, and may include as substituents 1 or 2 halogens, 1 or 2 lower alkyl groups or 1 or 2 lower alkoxy groups;
• aryl by itself or as part of another group refers to a monocyclic or bicyclic aromatic ring which contains 6 to 10 carbons in the ring portion, which may include as a substituent lower alkyl, halogen or lower alkoxy, which substituents will not be adjacent sterically hindered groups;
• and represents a single bond or double bond, with the proviso that where represents a double bond, A is CH.dbd.CH and B is CH.dbd.CH or (CH.sub.2).sub.2 and Y is other than alkenyl or alkynyl.