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Selenenic acid esters

The role played by benzeneseleninic acid or by phenylseleninyl chloride in promoting the rearrangement of A-aryl-benzohydroxamic acids PhOONArOH to p-hydroxy-benzanilides relies on the formation of seleninate or selenenate esters, respectively, followed by Claisen-type shifts to ortho- and then para-positions. ... [Pg.69]

A new site-selective dehydration can convert allylic alcohols (64) and (66) into the dienes (65) and (67) respectively, using 2,4-dinitrobenzenesulphenyl chloride in triethylamine. The intermediate selenenate ester presumably undergoes [2,3] sigmatropic rearrangement to the allyl selenoxide, which then fragments to the diene. Palladium diacetate-triphenylphosphine appears to be an effective catalyst for the elimination of acetic acid or phenol from allylic acetates or phenyl ethers respectively, leading to 1,3-dienes in high yield. ... [Pg.23]

See other pages where Selenenic acid esters is mentioned: [Pg.16]    [Pg.252]    [Pg.330]    [Pg.419]    [Pg.16]    [Pg.252]    [Pg.330]    [Pg.419]    [Pg.305]    [Pg.484]    [Pg.48]    [Pg.246]    [Pg.48]    [Pg.246]    [Pg.269]    [Pg.597]    [Pg.44]    [Pg.4319]    [Pg.1399]    [Pg.4318]   


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Selenenates

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