The present invention provides a fragrance precursor of formula I:
1
that is capable of forming a fragrant ketone of formula II:
2
and a fragrant lactone of formula III:
3
LAROCK, RICHARD C.;LEUCK, DAVID J.;HARRISON, L. WAYNE, TETRAHEDRON LETT., 29,(1988) N 49, C. 6399-6402
作者:LAROCK, RICHARD C.、LEUCK, DAVID J.、HARRISON, L. WAYNE
DOI:——
日期:——
US6939845B2
申请人:——
公开号:US6939845B2
公开(公告)日:2005-09-06
Synthesis of vinylic lactones via palladium-catalyzed coupling of vinylic halides or triflates and unsaturated carboxylic acids
作者:Richard C. Larock、David J. Leuck、L.Wayne Harrison
DOI:10.1016/s0040-4039(00)82356-4
日期:1988.1
Vinylic halides or triflates react with 3-butenoic or 4-pentenoic acids in the presence of 5% Pd(OAc)2 or Pd(dba)2, -Bu4NCl, -PrNEt2 and either acetonitrile or ,-dimethylformamide at 80–100°C to afford the corresponding γ-alkenyl-γ-butyro- or δ-alkenyl-δ-valerolactones respectively by an intramolecular π-allylpalladium displacement process.