Disclosed are compounds having the ability to inhibit cytochrome P450 2A6, 2A13, and/or 2B6 and tobacco products comprising them. Also disclosed are pharmaceutical compositions comprising them.
Cyclopentenones from 1,2-disiloxycyclobutene via silylated 1-vinylcylopropanols. Application to the synthesis of dihydrojasmone and cis-jasmone
作者:J. Salaün、Y. Almirantis
DOI:10.1016/s0040-4020(01)91969-6
日期:1983.1
An effective synthesis of 2,3-disubstituted 2-cyclopentenones involves C4→C3 ring contraction of the readily available 1,2-disiloxycyclobutene followed by thermal C3→C5 ring enlargement of trimethylsiloxyvinyl-cyclopropanes. To illustrate the convenience of this new approach the total syntheses of 2-methyl-3-p-tolyl-2-cyclopentenone, dihydrojasmone. and cis-jasmone are reported.
[EN] Disclosed are compounds having the ability to inhibit cytochrome P450 2A6, 2A13, and/or 2B6 and tobacco products comprising them. Also disclosed are pharmaceutical compositions comprising them. [FR] L'invention concerne des composés capables d'inhiber le cytochrome P450 2A6, 2A13 et/ou 2B6 ainsi que des produits du tabac les comprenant. L'invention concerne également des compositions pharmaceutiques les comprenant.
Conjugate Reduction of α,β-Unsaturated Carbonyl Compounds Catalyzed by a Copper Carbene Complex
作者:Valdas Jurkauskas、Joseph P. Sadighi、Stephen L. Buchwald
DOI:10.1021/ol034560p
日期:2003.7.1
[reaction: see text] An N-heterocyclic carbene copper chloride (NHC-CuCl) complex (2) has been prepared and used to catalyze the conjugatereduction of alpha,beta-unsaturated carbonylcompounds. The combination of catalytic amounts of 2 and NaOt-Bu with poly(methylhydrosiloxane) (PMHS) as the stoichiometric reductant generates an active catalyst for the 1,4-reduction of tri- and tetrasubstituted alpha