ISSN:
1573-1561
Schlagwort(e):
Sweet-potato weevil
;
Coleoptera
;
Curculionidae
;
Cylas formicarius
;
sex pheromone
;
(Z)-3-dodecen-1-yl (E)-2-butenoate
;
ethylene oxide
;
hexamethylphosphoric triamide
;
3-butyn-1-ol
;
liquid ammonia
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Chemie und Pharmazie
Notizen:
Abstract An alternative synthesis of (Z)-3-dodecen-1-y1 (E)-2-butenoate without use of carcinogenic ethylene oxide and HMPA is described. By coupling of the tetrahydropyranyl (THP) ether of 3-butyn-1-ol with 1-bromooctane with sodamide in liquid ammonia, 12-(2-tetrahydropyranyloxy)-9-dodecyne was obtained; subsequent hydrolysis and semihydrogenation afforded (Z)-3-dodecen-1-ol. The alcohol was then reacted with crotonyl chloride to give the desired crotonate with a total yield of 29.8%. Males of sweet-potato weevil,Cylas formicarius were strongly attracted to the synthetic sex pheromone. The attraction from the dispenser of polyethylene tube was better than the attraction from the dispenser of rubber septum in the field.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00993745