The Synthesis of α-Azidoesters and Geminal Triazides
作者:Philipp Klahn、Hellmuth Erhardt、Andreas Kotthaus、Stefan F. Kirsch
DOI:10.1002/anie.201402433
日期:2014.7.21
representatives of this novel class of triazide compounds: Despite their high nitrogen content, the geminaltriazides are easy to handle, even when preparative‐scale syntheses are performed. (Caution: These procedures still require protective measures!) The triazides are now broadly available for further studies regarding their properties and reactivity. Furthermore, we show how the method can be used to
Novel process for the synthesis of 2-fluoro-1-olefins
申请人:MERRELL DOW PHARMACEUTICALS INC.
公开号:EP0410380A3
公开(公告)日:1992-04-08
A process for preparing 2-fluoro-1-olefins or terminal bis-beta-fluoro-olefins which comprises reacting an appropriate allyl or alpha-olefinated starting material with phenylselenyl chloride and silver fluoride, and then reacting the intermediate phenylselenyl fluoride compound with ozone, and further reacting the resulting phenylselenoxide compound with an appropriate amine, to yield the desired fluorinated compounds.
Mechanistic studies on the cobalt(II) Schiff base catalyzed oxidation of olefins by O2
作者:Dorothy E. Hamilton、Russell S. Drago、Alan Zombeck
DOI:10.1021/ja00236a014
日期:1987.1
with the d/sub z/sup 2// electron of CoSMDPT. The cobalthydroperoxide then adds to the olefin double bond, leading to formation of an alkyl hydroperoxide. Haber-Weiss decomposition of this alkyl hydroperoxide by CoSMDPT produces the observed ketone and alcohol products. Deactivation of the catalyst is due to oxidation of the ligand system of the cobalt complex as well as formation of a ..mu..-peroxo-dicobalt
observed. The metalation products 5–7 show follow-up reactions like 1,3-H shift to the corresponding 1-lithio-1-alkynes 8 and subsequentmetalation to the dilithioalkynes 9. Additionally, lithium hydride elimination and ring-chain rearrangement (for 5c) are observed. 1,2-Hexadiene (3b) can be brought to reaction with lithium metal in the apolar solvent pentane, here the follow-up reactions are much slower
Photocatalytic Asymmetric Epoxidation of Terminal Olefins Using Water as an Oxygen Source in the Presence of a Mononuclear Non-Heme Chiral Manganese Complex
作者:Duyi Shen、Claudio Saracini、Yong-Min Lee、Wei Sun、Shunichi Fukuzumi、Wonwoo Nam
DOI:10.1021/jacs.6b10836
日期:2016.12.14
epoxidation of terminal olefins using a mononuclear non-heme chiral manganese catalyst, [(R,R-BQCN)MnII]2+, and water as an oxygen source yields epoxides with relatively high enantioselectivities (e.g., up to 60% enantiomeric excess). A synthetic mononuclear non-heme chiral Mn(IV)-oxo complex, [(R,R-BQCN)MnIV(O)]2+, affords similar enantioselectivities in the epoxidation of terminal olefins under stoichiometric