Dj. Gavin et Nwa. Geraghty, A GENERAL-SYNTHESIS OF (+ -)-GAMMA-SUBSTITUTED GAMMA-BUTYROLACTONES USING A KINETIC ALKYLATIONOZONOLYSIS PROCEDURE/, Synthetic communications, 24(10), 1994, pp. 1351-1361
A synthesis of (+/-)-gamma-substituted gamma-butyrolactones is describ
ed in which the key intermediates, gamma-ketoesters, are prepared from
the readily available 6-methyl-5-hepten-2-one using a kinetic alkylat
ion-ozonolysis procedure; the method allows terminal ester and Z-alken
e groups to be incorporated into the side-chain and thus can be used f
or the synthesis of (+/-)-gamma-jasmolactone as well as other naturall
y occurring lactones.