41547-22-2Relevant articles and documents
New Sigmatropic Sequences Based on the Wittig Rearrangement of Bis-Allylic Ethers. Regiocontrolled Joining Reactions of Two or Three Allylic Moieties Leading to Unsaturated Carbonyl Compounds
Mikami, K.,Taya, S.,Nakai, T.,Fujita, Y.
, p. 5447 - 5449 (1981)
Three new sigmatropic sequences based on the Wittig rearrangement of bis-allylic ethers are described which provide unique, regiocontrolled methods for the synthesis of a variety of unsaturated carbonyl compounds possessing interesting molecular frameworks.
UNIQUE HALOGEN-INDUCED CYCLIZATIONS, REAGENTS THEREFOR, AND COMPOUNDS PRODUCED THEREBY
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Page/Page column 126-127, (2012/04/04)
This disclosure is related to halonium compounds useful for cyclization of polyenes, alkenoic acids, and alkenyl alkyl ethers, and halogenation of aromatic compounds. The synthesis of such halonium compounds, compounds made using such halonium compounds, and synthesis of natural compounds, including decalins, using the halonium compounds is also disclosed. A representative halonium compound of the disclosure is: Formula (I).
Hydrazides as tunable reagents for alkene hydroamination and aminocarbonylation
Roveda, Jean-Gregoire,Clavette, Christian,Hunt, Ashley D.,Gorelsky, Serge I.,Whipp, Christopher J.,Beauchemin, Andre M.
supporting information; experimental part, p. 8740 - 8741 (2009/12/04)
(Chemical Equation Presented) Benzoic hydrazides (R = Ph), which are remarkably bench and thermally stable reagents (often up to 230°C), afford intramolecular hydroamination products upon heating at high temperatures (120-235°C). A concerted Cope-type hydroamination event, followed by a hydrazide-mediated proton transfer step of the hydrazinium ylide intermediate, is proposed and supported by DFT calculations. In contrast, a simple modification of the reagent structure (R = Ot-Bu or NH2) favors the formation of aminocarbonylation products at 200°C, and the latter reaction is shown to be stereospecific. Copyright
