1999 ring closure reactions

ring closure reactionsO 0130

04 - 050New Method for the Preparation of an Active Manganese Speciesand Its Use for Radical Cyclization Reactions. — Active manganesemetal, freshly prepared by reduction of Li2MnCl4 with magnesium, initiatesradical cyclizations of 2-haloethanal allylic or propargylic acetals (I) and(VII), iodoethyl allylic ethers [cf. (III)], and the corresponding amine (V). —(TANG, J.; SHINOKUBO, H.; OSHIMA, K.; Synlett (1998) 10, 1075-1076;Div. Mater. Chem., Fac. Eng., Kyoto Univ., Yoshida, Kyoto 606-01, Japan; EN)

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