(. eta. 5-C5H5)(CO) 2FeCH2S+ (CH3) 2 BF4-: a methylene transfer reagent for the direct cyclopropanation of alkenes

EJ O'Connor, S Brandt, P Helquist

Index: O'Connor,E.J.; Brandt,S.; Helquist,P. Journal of the American Chemical Society, 1987 , vol. 109, p. 3739

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Citation Number: 45

Abstract

Abstract: Cp (C0) 2FeCH2S+(CH3) 2 BF4-(5a, Cp= $-cyclopentadienyl) is readily prepared by the reaction of the ferrate N~+[CP (CO)~ F~]-with chloromethyl methyl sulfide to give the alkylation product CP (CO)~ F~ CH~ SCH,(4) as an intermediate that need not be isolated but which is treated directly with various methylating agents (eg (CH3) 30+ BF4-,(CH30) 2CH+ BF,-, FS03CH3, etc.) to give 5a. This salt is an exceptionally stable organometallic ...

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