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Ring Dowd-Beckwith

Scheme 5.46 Domino Beckwith-Dowd ring expansion/5-exo-cyclization process. Scheme 5.46 Domino Beckwith-Dowd ring expansion/5-exo-cyclization process.
Ring expansion reactions of free radicals are useful in synthesis (equation 77) and were reported independently in 1987 by the groups of Beckwith and Dowd " ... [Pg.33]

The factors that effect the partition of a radical (resulting from reaction of the halide precursor with AIBN-BusSnH) between three-carbon Dowd-Beckwith ring expansion... [Pg.485]

One-carbon ring expansion was first observed by Barton and then by Tada [3], but its synthetic potential was not fully explored until Dowd and Beckwith s concurrent work on /3-keto esters (Scheme 2) [4], Radical precursors, readily prepared by alkylation of /f-keto esters derived from the Dieckmann condensation, undergo... [Pg.732]

In addition to one-carbon ring expansion, the Dowd-Beckwith reaction has been successfully applied to three- and four-carbon ring expansions (Scheme 6) [4, 10). Because of the slower cyclization rate associated with a longer side chain, the... [Pg.734]

Other references related to the Dowd-Beckwith ring expansion are cited in the literature. ... [Pg.941]

Beckwith (see Dowd-Beckwith Ring Expansion Reaction) Belleau (see Fujimoto-Belleau Reaction)... [Pg.2]

See other pages where Ring Dowd-Beckwith is mentioned: [Pg.264]    [Pg.264]    [Pg.939]    [Pg.210]    [Pg.218]    [Pg.822]    [Pg.732]    [Pg.732]    [Pg.736]    [Pg.947]    [Pg.218]    [Pg.939]    [Pg.940]    [Pg.200]    [Pg.225]    [Pg.97]    [Pg.97]    [Pg.200]   
See also in sourсe #XX -- [ Pg.264 ]

See also in sourсe #XX -- [ Pg.264 ]



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Beckwith

Dowd-Beckwith ring expansion

Radical reactions Dowd-Beckwith ring expansion

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