ENANTIOSELECTIVE SYNTHESIS OF SPIRO[4.4]NON- AND SPIRO[4.5]DEC-2-ENE-1,6-DIONES

Authors
CHITKUL B PINYOPRONPANICH Y THEBTARANONTH C THEBTARANONTH Y TAYLOR WC
Citation
B. Chitkul et al., ENANTIOSELECTIVE SYNTHESIS OF SPIRO[4.4]NON- AND SPIRO[4.5]DEC-2-ENE-1,6-DIONES, Tetrahedron letters, 35(7), 1994, pp. 1099-1102
Citations number
14
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
35
Issue
7
Year of publication
1994
Pages
1099 - 1102
Database
ISI
SICI code
0040-4039(1994)35:7<1099:ESOSAS>2.0.ZU;2-3
Abstract
Spiro[4.4]non- and spiro[4.5]dec-2-ene-1,6-diones [2; n = 0 and 1] wer e prepared in moderate to high enantiomeric purities via asymmetric al lylation of enamines 6 and ketal derivatives 7 and 8 formed from keto- esters 5, followed by a carbanionic cyclization process.