78872-02-3Relevant articles and documents
The Conversion of Ethyl Dienol Ether and Dienyl Pivalate Derivatives of Hagemann's Ester into Bicyclic Enones
Baker, Murray V.,Ghitgas, Christine,Dancer, Robert J.,Haynes, Richard K.,Sherwood, Gloria V.
, p. 1331 - 1340 (2007/10/02)
The cyclization of compounds obtained from ethyl dienol ether and dienyl pivalate derivatives of Hagemann's ester has been examined.The carbanions of methyl phenyl sulfone and methyl phenyl sulfoxide react with the methylated dienol ether (4) to give the
ZUR REGIOSELEKTIVITAET BEIM ALDOL-RINGSCHLUSS
Kreiser, Wolfgang,Below, Peter
, p. 429 - 432 (2007/10/02)
According to the proper choice of reaction conditions, a regioselective ring closure of the 1,5-diketones I is achieved, either to II or III.This directed aldolisation was successfully applied to a short synthesis of the monoterpenoid piperitone.