✍ Scribed by F. Van Hulle; V. Sipido; M. Vandewalle
No coin nor oath required. For personal study only.
A previous paper' described the potentiality of 3-alkyl-1,2,4-cyclopentanetriones (in the mono enol form I) as starting materials for the synthesis of the prostaglandin skeleton. In this communication we wish to report the synthesis
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Recently we have shown that the combination of a regioselective nucleophilic
Successful synthetic approaches to cycloheximide (I) and its isomers have led either to I itself', to neocycloheximide l,o (II) or to mixtures of isocycloheximide (III) andd-e&-isocycloheximide (IV) together with other position isomers4. The latter in ?H CH3.$.
The novel sialyl donor methyl [ethyl 5-(N,N-diacetyl)-4,7,8,9-tetra-O-acetyl-2-thio-3thiophenyl-2,3,5-trideoxy-D-erythro-o,-L-gluco-2-nonulopyranosid]onate (2) was synthesized by Nacetylation of the corresponding 5-acetamido compound 1. a-Sialylation of mono-and disaccharide aglycons, having one or