Hole-transfer catalyzed reaction: One-electron oxidation as a strategy for the selective cyclopropanation of π bonds
作者:Gholam A. Mirafzal、Albena M. Lozeva、Jeffrey A. Olson
DOI:10.1016/s0040-4039(98)02163-7
日期:1998.12
The cyclopropanation of alkenes, dienes and trienes with ethyl diazoacetate catalyzed by tris(4-bromophenyl)aminium hexachloroantimonate have been studied. The efficiency and selectivity of cyclopropanation is based solely upon, and is highly sensitive to, the ease of ionization of π bonds in the substrate. Simple double bonds such as norbornene and 1-octene are not amenable to cyclopropanation via
The present invention relates to compounds of the general formula ##SPC1## In which R represents the hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group; R.sub.1 represents the hydrogen atom, a lower alkyl group, preferably methyl, or an aralkyl group; A represents an alkylene group; and R.sub.0 represents the hydrogen atom or an acyl group; and their acid addition salts as new industrial products. These new products are suitable for use in the treatment of cardiac disorders.
The synthesis of a lead anti-viral cyclopropyl carboxy acyl hydrazone 4F17 (5) and three sequential arrays of structural analogues along with the initial assessment and optimization of the antiviral pharmacophore against the herpes simplex virus type 1 (HSV-1) are reported.