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Chiral specificity in responses by the bark beetleDendroctonus valens to host kairomones
TLDR
The attraction of the red turpentine beetle to the resin volatiles of its host,Pinus ponderosa, is elicited by three chiral monoterpenes, demonstrating the importance of chirality of host compounds in the host finding behavior of this bark beetle. Expand
Enantiomeric composition of ipsdienol: A chemotaxonomic character for north American populations ofIps spp. in thepini subgeneric group (coleoptera: Scolytidae)
TLDR
The presence of the New York type in western Canada is likely linked to the Quaternary history of the transcontinentally distributed host,Pinus banksiana Lamb, and a third phenotype may occur in southeastern British Columbia, Idaho, and Montana, possibly indicating a zone of hybridization. Expand
Synthesis of pentalenolactone E and F through biogenetic like cyclization of humulene
Abstract 3-Methoxy-3,6-secoprotoilludan-6-one, derived from humulene, was converted to 3-pentalenen-6-ol, which furnished pentalenolactone E and F through several steps.
Chemical conversion of humulene to cyclohumulanoids along the biosynthetic pathway. Sterpurene, a hydrocarbon from silver-leaf disease fungus
Abstract Sterpurene, a cyclohumulanoid obtained from silver-leaf disease fungus, was chemically derived from humulene via a route analogous to biosynthesis.
SELECTIVE OXIDATION OF ALLYLIC METHYLS IN MEDIUM RING COMPOUNDS
Allylic methyls in medium ring compounds were selectively oxidized to primary alcohols and αβ-unsaturated aldehydes by means of t-butylhydroperoxide and selenium dioxide supported on silica gel.
Conformationally selective transannular cyclizations of humulene 9,10-epoxide. Synthesis of the two skeletally different cyclohumulanoids: dl-bicyclohumulenone and dl-africanol
Two cyclohumulanoids, dl-bicyclohumulenone (4) and dl-africanol (7 were synthesized through newly developed conformationally selective transannular cyclization of humulene 9,10-epoxide (2). TheExpand
In vitro conversion of humulene to (.+-.)-pentalenolactone G,H, and pentalenolactone.
Pentalenolactone (PL), PLH, and PLG were derived from 3,6-epoxy -3,6-seco-7(13)-protoilluden-10-ol which in turn was obtained from humulene. Conformation of PL’s was studied by NMR.
SYNTHESIS OF PENTALENIC ACID THROUGH BIOGENETIC LIKE CYCLIZATION OF HUMULENE
Humulene furnished 4,7-epoxy-3-methylene-7,10,10-trimethyl-11-bicyclo[6,3,0]undecanol 9 in 34% yield employing oxymercuration as a key step. On treatment withExpand
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