✦ LIBER ✦

A novel synthesis of unsaturated spiro compounds based on reactions of bifunctional organometallic reagents.

✍ Scribed by Perséphone Canonne; Raynald Boulanger; Paul Angers

Publisher: Elsevier Science
Year: 1991
Tongue: French
Weight: 277 KB
Volume: 32
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)79411-1

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✦ Synopsis

Z-allylzc drbromades regto-and stereoselectrvely prepared were reacted wtth the somum e&ate of ethyl acetoacetate or dz(a-etho~myl)cuprate to peld, after hydrolyses, and decarbonylatton tn the case where the enolate of ethylacetoacetate was the nucleophtle. the correspondmg ketones After reductton and brommatton, the products were converied gnto the appropnate organometallrc compounds and reacted wzth selected cyclrc anhydndes and &halo-a&unsaturated cychc ketones The spzro compounds so obtatned are key zntermedrates for the syntheses of naturally occumng sptro sesquaterpenes

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## Abstract For Abstract see ChemInform Abstract in Full Text.

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