Substituted cyclopentenyloxabicyclooctanes, cyclopentenyl-formylcyclohexenes, cyclopentenylhydroxymethyl cyclohexenes and camphonyl spirocyclooxaoctane-containing compositions, organoleptic uses thereof and process for preparing same
申请人:INTERNATIONAL FLAVORS & FRAGRANCES INC.
公开号:EP0485061A1
公开(公告)日:1992-05-13
There are provided a cyclopentenyl-oxabicyclooctane, cyclopentenyl-formylcyclohexene and/or cyclopentenylhydroxymethyl cyclohexene and mixtures thereof, the use thereof in perfumes, etc, and detergents, and processes for preparing such compounds, as well as camphonyl spirocyclooxaoctane compositions and the use thereof in perfumes, etc.
Heteroaromatic Trapping of Tricyclic 2-Oxidocyclopentenyl Cations: A Surprisingly Efficient Example of Intermolecular Interrupted Nazarov Reaction
作者:Frederick G. West、Curtis J. Rieder、Ryan J. Fradette
DOI:10.3987/com-09-s(s)132
日期:——
Bis(cycloalkenyl) ketones 2a and 2f underwent Nazarov cyclization and intermolecular trapping by electrophilic aromatic substitution with furans, thiophenes, pyrroles, indoles and dimethoxybenzene. Only the cis-anti-cis diastereomer was isolated with dicyclopentenyl ketone 2a, whereas a mixture of diastereomers was seen with 2f (albeit with complete regioselectivity). Comparable interrupted Nazarov trapping was not seen with acyclic dienones 2b-e, indicating the possible involvement of conformation effects in the polycyclic intermediates derived from 2a and 2f.