Oxidation of allylselenides with the Sharpless AD-reagents
摘要:
Allylselenides are efficiently oxidized by AD-mix reagents. Oxidation takes chemoselectively place on the selenium atom of allylselenides bearing a methylseleno or a phenylseleno moiety, but chemoselectively occurs on the C,C double bond of the corresponding omicron-nitropbenyl derivatives. (C) 1997 Elsevier Science Ltd.
Samarium(II) Di-iodide Induced Synthesis of Allylic Phenyl Selenides from Allylic Acetates and Diphenyl Diselenide in the Presence of Palladium Catalyst
Allylic phenyl selenides are prepared efficiently from the reaction of allylicacetates and diphenyl diselenide induced by samarium(II) diiodide in the presence of a palladium catalyst under mild conditions.
An iridium‐catalyzed allylic substitution of sodiumphenylselenide with unsymmetrical allyl carbonates was accomplished, which produced the linear allyl phenylselenides in 38%–74% yields. An asymmetric iridium‐catalyzed allylation of sodiumphenylselenide was presented as well.
Synthesis of protected allylic amines from allylic phenyl selenides: Improved conditions for the chloramine T oxidation of allylic phenyl selenides
作者:John E. Fankhauser、Richard M. Peevey、Paul B. Hopkins
DOI:10.1016/s0040-4039(01)91136-0
日期:1984.1
Anhydrous chloramine T in methanol is a highly effective reagent for the conversion of allylicphenylselenides to the corresponding rearranged N-allylic-p-toluenesulfonamides. The reaction presumably proceeds via an allylic selenimide intermediate which undergoes [2,3]-sigmatropic rearrangement.
A new synthesis of secondary allylic aliphatic and aromatic amines
作者:Andreas Spaltenstein、Philip A. Carpino、Paul B. Hopkins
DOI:10.1016/s0040-4039(00)83963-5
日期:1986.1
Treatment of a variety of aliphatic or aromatic primary amines with an N-chlorosuccinimideactivated allylic setenide affords in modest to good yield the corresponding allylically rearranged secondaryamines. Examples are reported which define the scope and limitations of this process.
Allylic and propargylic phenyl selenide oxygenation by cyclohexanone oxygenase: [2,3]-sigmatraopic rearrangement of the enzyme-generated selenoxide
作者:John A. Latham、Bruce P. Branchaud、Y.-C. Jack Chen、Christopher Walsh
DOI:10.1039/c39860000528
日期:——
Enzymic oxidation of propargyloic and allylic selenides has been carried out and the resulting selenoxides found to readily undergo 2,3-sigmatropic rearrangement; the propargylic product undergoes fragmentation while the allylic product yields racemic alcohols.