A binary mixture of benzyl-amine and hexa-noic acid has been reacted to form the title salt, C(7)H(10)N(+)·C(6)H(11)O(2) (-). This crystal has a 1:1 stoichiometry of acid- and amine-derived species which contrasts with other related species which can have a number of other integer ratios of acid and amine components. The diffraction data indicate complete transfer of a proton from the acid to t...

Abstract The synthesis of poly(ε-caprolactone) (PCL) tetra-arm star polymer was carried out using “click” chemistry and ring-opening polymerization techniques. For this purpose, azido (PCL-N 3 ) acquired ε-caprolactone 2-[2-(2-azidoethoxy)ethoxy]ethanol (N ol). N ol obtained sodium azide 2-[2-(2-chloroethoxy)ethoxy]ethanol. 4-(prop-2-ynyloxy)-phthalonitrile by 4-nitrophthalonitrile propargyl al...

An approach to reserpine (1) is described which is based on an anionic oxy-Cope rearrangement to establish three of the five contiguous asymmetric centers of the E ring and a regiospecific enol silylation coupled with hydroboration-oxidation to introduce the last two centers. The key intermediate 8b for the anionic oxy-Cope rearrangement is prepared from the readily available 7,7-dimethoxynorbo...

Abstract An asymmetric approach toward the synthesis of marine natural product aspergillide‐C has been developed. The convergent uses two Noyori transfer hydrogenations to enantioselectively prepare key fragments, a C ‐1 ‐7 pyranone fragment and ‐8 ‐14 β ‐keto‐sulfone fragment. absolute stereochemistry was established by reduction ‐furylketoester form furyl alcohol. Achmatowicz rearrangement us...

A series of aminoacetylenicoxyphthalimide namely N-[4-(t-amino)-2-butynyloxy] phthalimides were synthesized from the reaction of N-hydroxyphthalimide with propargyl bromide in sodium ethoxide to generate N-(2-butynyloxy)phthalimide. The desired compounds were prepared through Mannich reaction of N-(2-butynyloxy)phthalimide with formaldehyde, appropriate amine in peroxide-free dioxin and cuprous...

Sarkhoon gas plant, located in south of Iran, has been installed to removal H2S contained in a high pressure natural gas stream. The solvent used for the H2S removal from gaseous stream is 34% by weight (wt%) Di-ethanol amine (DEA) solutions. Due to increasing concentration of heat stable salt (HSS) in solvent, corrosivity of amine solution had been increased. Reports indicated that there was c...

Recently, gold-carbenoid species have been proposed as intermediates in gold-catalyzed enyne rearrangements.1 Additionally, the reaction of gold complexes with propargyl esters has been developed as an alternative approach to metal carbenoids capable of effecting olefin cyclopropanation;2,3 however, to date, the reaction of electrophilic metals with alkynes has not been amenable to the generati...