Elucidation of the regio- and chemoselectivity of enzymatic allylic oxidations with <i>Pleurotus sapidus</i> – conversion of selected spirocyclic terpenoids and computational analysis
作者:Verena Weidmann、Mathias Schaffrath、Holger Zorn、Julia Rehbein、Wolfgang Maison
DOI:10.3762/bjoc.9.262
日期:——
Allylic oxidations of olefins to enones allow the efficient synthesis of value-added products from simple olefinic precursors like terpenes or terpenoids. Biocatalytic variants have a large potential for industrial applications, particularly in the pharmaceutical and food industry. Herein we report efficient biocatalytic allylic oxidations of spirocyclic terpenoids by a lyophilisate of the edible fungus
Tin(II) Trifluoromethanesulfonate-Catalyzed Highly Selective Synthesis of 2-Substituted 4-Methylenetetrahydropyrans from Trimethyl{2-[2-(trimethylsiloxy)ethyl]allyl}silane and Acetals
A variety of 2-substituted 4-methylenetetrahydropyrans are easily produced by the reaction of acetals with trimethyl2-[2-(trimethylsiloxy)ethyl]allyl}silane under the influence of a catalytic amount of tin(II) trifluoromethanesulfonate.
[EN] IMPROVEMENT IN OR RELATING TO ORGANIC COMPOUNDS<br/>[FR] AMÉLIORATION APPORTÉE À DES COMPOSÉS ORGANIQUES
申请人:GIVAUDAN SA
公开号:WO2020120643A1
公开(公告)日:2020-06-18
The present invention is concerned with fragrance ingredients and with fragrance preparations, for imparting desirable odor notes to consumer products, in particular it is concerned with (2S,4R)-4-methyl-2-((Z)-2-methylbut-1-en-1-yl)tetrahydro-2H-pyran that can be used as replacements for 4-methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H- pyran.
Novel condensation of ketones with homoallyl alcohols catalyzed by Hg(OTf)2 has been developed, generating a 6-membered ring ether alcohol, bisether, and olefins. The reaction is initiated b hemiacetal formation, and cyclization of the resulting oxonium cation provides the 6-membered ring carbocation as a common intermediate. Thus, it is a catalytic Prins-type condensation of non-activated homoallyl
(2S,4R)-4-METHYL-2-(2-METHYLBUT-1-EN-1-YL)TETRAHYDRO-2H-PYRANEN AS FRAGRANCE INGREDIENT
申请人:Givaudan SA
公开号:EP3666763A1
公开(公告)日:2020-06-17
The present invention is concerned with fragrance ingredients and with fragrance preparations, for imparting desirable odor notes to consumer products, in particular it is concerned with (2S,4R)-4-methyl-2-((Z)-2-methylbut-1-en-1-yl)tetrahydro-2H-pyran that can be used as replacements for 4-methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H-pyran.