作者: Patrick Metzner
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摘要: Thiocarbonyl compounds (thioamides, thioesters, thioketones...) react readily with a large variety of reagents (nucleophiles, electrophiles and radicals) due to their weak C=S bond the aptitude sulfur stabilise an adjacent charge or radical centre. Thus, nucleophilic additions, deprotonation, sigmatropic rearrangements are often more facile than in oxygen series. Moreover, number specific reactions have been uncovered: thiophilic addition nucleophiles, Michael enethiolates, Eschenmoser reaction, oxidation sulfines, [4+2] [3+2] cycloaddition 1,3-dienes 1,3-dipoles. Far from being purely exotic species, thiocarbonyl now efficient tools indeed used multi-step synthetic schemes leading various products biological interest.