- Catalytic activation of diazo compounds using electron-rich, defined iron complexes for carbene-transfer reactions
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Carbene transfer: The electron-rich iron complex Bu4N[Fe(CO) 3(NO)] efficiently catalyzes different carbene-transfer reactions. Various diazo compounds can be used. The high stability of the employed iron complexes is demonstrated by the generation of the diazo reagent in situ and a sequential iron-catalyzed allylic sulfenylation/Doyle-Kirmse reaction. Copyright
- Holzwarth, Michael S.,Alt, Isabel,Plietker, Bernd
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supporting information; experimental part
p. 5351 - 5354
(2012/07/14)
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- A new approach to reductive deprotection of thioethers with a low-valent titanium reagent
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Low-valent titanium mediated cleavage of carbon-sulphur bond is reported. This has resulted in an efficient and mild protocol for the deprotection of allyl/benzyl thioethers under reductive condition and with good yields. Deprotection can be performed regio- and chemo-selectively in the presence of acid, ester and N-benzyl/allyl functionalities and is general for aliphatic and aromatic precursors.
- Shadakshari,Talukdar,Chattopadhyay
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p. 1007 - 1010
(2007/10/03)
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- Pyrolyses of o-Alkoxy- and o-Alkylthio-N-Allylanilines and of Some Related O- and S-Allyl Compounds
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The o-substituted allyl compounds (1)-(12) have been pyrolysed in order to generate aminyl, phenoxyl, and thiophenoxyl radicals with adjacent substituents.In all cases, products are formed by intramolecular hydrogen transfer from the substituent to the radical centre.This process may be followed by rearrangement to give an aldehyde, by heteroatom extrusion to give an alkene, or by ring formation to give five-membered ring heterocycles (Scheme 1, routes A, B1, and B2 respectively.The distribution of products formed by each route is dependent both on the nature of the o-substituent, and on the nature of the initial radical.
- Cadogan, J. I. G.,Hickson, Clare L.,McNab, Hamish
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p. 1885 - 1890
(2007/10/02)
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