Richard W. Franck

A revision of the value for the anomeric effect

Abstract An analysis of literature data has resulted in the establishment of an equation for the correlation of the apparent size of a substituent in a tetrahydropyran with its size in cyclohexane. This correlation permits the re-evaluation of the anomeric effect for ether oxygen and the assignment of anomeric effects to carbomethoxy, methylamino and dimethylamino.

A preparation of enamines

Enamine (III) entstehen aus den N-Silyl-aminen (I) und den Oxo-Verbindungen (II) in hohen Ausbeuten.

A stereocontrolled route to a synthon for the aglycone of the aureolic acids

Cyclohexenone 3, a synthon for the aureolic acid aglycone, has been prepared using D-fucose and trimethylsilyloxybutadiene as starting materials.

Regiochemically controlled syntheses of 3-hydroxynaphtho [b] cyclobutene by vicinal diester dianion condensation.

Utilization of the dianion derived from dimethyl trans-1,2-cyclobutane dicarboxylate allows for the rapid construction of an unsymmetric naphtho [b] cyclobutene by two different routes.