In this communication flow Friedel–Crafts alkylation was studied using hydroxy‐substituted sulfonic acid‐functionalized silica as a catalyst and 1‐adamantanol as a model substrate. The reaction of 1‐adamantanol (1a) with toluene (2a) proceeded well with 5 min of residence time at 120°C to give good yield of 1‐tolyladamantane (3a) as a 1:9 mixture of meta and para isomers. When the flow synthesis was
METHOD FOR PREPARATION OF 6-[3(1-ADAMANTYL) -4-METHOXYPHENYL]-2-NAPHTOIC ACID
申请人:Kalvinsh Ivars
公开号:US20100076219A1
公开(公告)日:2010-03-25
A method for preparation of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid is disclosed based on “one pot” synthesis approach including a direct synthesis of boronic acid derivative from 2-(1-adamantyl)-4-bromoanisole and cycloboranes with a subsequent Suzuki-Miyaura coupling with 6-halonaphthenoates and basic hydrolysis of the reaction product in ethylene glycol or 1,2-propanediol.
PROCESS FOR PREPARATION OF 6-[3-(1-ADMANTYL)-4-METHOXYPHENYL]-2-NAPHTOIC ACID.
申请人:Kalvinsh Ivars
公开号:US20100160677A1
公开(公告)日:2010-06-24
A process for preparation of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid from 2-(1-adamantyl)-4-bromanisolee is disclosed, based on transformation of 2-(1-adamantyl)-4-bromanisole into a Grignard's reagent by using metallic magnesium, anhydrous lithium chloride and dibromoethane followed by transmetallation with borates to 3-(adamantyl)-4-methoxyphenylboronic acid, which is converted into 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid esters by Suzuki-Miyaura cross-coupling reaction with alkyl-6-halonaftoates catalyzed by Pd [0] or Pd/phosphine ligands and followed by basic hydrolysis in ethylene glycol or 1,2-propanediol of ester thus obtained into 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid.
METHOD FOR PREPARTION OF SUBSTITUTED ADAMANTYLARYMAGNESIUM HALIDES
申请人:Kalvinsh Ivars
公开号:US20100113816A1
公开(公告)日:2010-05-06
The present invention concerns fine organic synthesis, particularly the method for preparing of substituted adamantylarylmagnesium halides.
The known methods for preparing Grignard's reagent from substituted adamantylarylhalide give very low yeld of the desired product. Substituted adamantylarylhalides are active intermediates that by interacting with various electrophiles provide for a wide range of biologically active compounds.
The aim of current invention was to develop a method for preparing substituted adamantylarylmagnesium halides. The aim was attained adding lithium chloride in the Grignard's reagent synthesis by acting on is magnesium metal in dry tetrahydrofuran under argon by substituted adamantylarylhalide.
It was demonstrated that adding lithium chloride to adamantylarylhalide within a range from 1:1 to 1:2 provides for stable high yield of the desired end product.
PROCESS FOR THE PREPARATION OF AROMATIC DERIVATIVES OF 1-ADAMANTANE
申请人:Comely Alexander Christian
公开号:US20100010265A1
公开(公告)日:2010-01-14
Process for the obtaining of 1-adamantane (tricycle[3.3.1.1 (3,7)]decane) derivatives, or of a pharmaceutically acceptable salt thereof, based on a carboxylation reaction, via metallation, of a precursor compound with an adequate leaving group. It also comprises the preparation of the precursor compound by means of a selective coupling of the corresponding boron, magnesium or zinc derivative with the corresponding disubstitute aromatic derivative. It is especially useful for the obtaining of Adapalene at industrial scale with good yield and high purity.