Preparation and alkylation of cyclic β-t
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Edward Piers; Lun Allan Tse Hoi
📂
Article
📅
1984
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Elsevier Science
🌐
French
⚖ 218 KB
The key steps of a newly developed annulation method involve (a) reaction of cyclic S-trifluoromethanesulfonyloxy a,S-unsaturated esters (e.g. 14-16) with lithium --(phenylthio)(trlmethylstannyl)cuprate, (b) alkylation of the resultant products (e.g. 17-19) -with l,wdihaloalkanes, and (c) transmetal