Thioesters, Selenoesters, and Related Compounds

Thioesters, selenoesters and related compounds. - Cobalt (II) chloride 280 281 282 283 284 

The nitro-alkenes (311) are readily available using aldol condensations and are good Michael acceptors direct ozonolysis of 

Thioester functions have again featured in some highly selective aldol condensations. The oxazoline (314), derived from (L)-aspartic acid, gives very largely isomers (315) upon enolisation, aldol 

Lewis acid catalysed condensations with aldehydes. The syn-isomers 

0-Keto-thionoesters (320) are obtainable by acylation of ketone enolates using a trithiodicarbonate (319) in generally excellent 

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