Abstract:
PROBLEM TO BE SOLVED: To produce an ester compound by transesterification using an inexpensive and low toxic inorganic compound.SOLUTION: Transesterification of an ester compound and an alcohol compound is carried out under the presence of lanthanum nitrate (for example, lanthanum nitrate hexahydrate) and a phosphine compound (for example, tri-n-octylphosphine), thereby obtaining the ester product. For example, transesterification of dimethyl carbonate and benzyl alcohol is carried out under the presence of 1 mol% of lanthanum nitrate hexahydrate, and 2 mol% of tri-n-octylphosphine, thereby obtaining benzyl methylcarbonate at a yield of >99%.
Abstract:
The present invention relates to a process for the preparation of 1-(2-ethyl-butyl)-cyclohexanecarboxylic acid which is useful as an intermediate in the preparation of pharmaceutically active compounds.
Abstract:
PROBLEM TO BE SOLVED: To provide a chemically amplified positive resist composition suitable for ArF excimer laser lithography and good in properties such as resolution, sensitivity and a pattern form, and also line edge roughness, in particular. SOLUTION: The composition includes a polymer which is soluble or poorly soluble in an aqueous alkali solution but becomes soluble in the solution by action of an acid, a compound which generates the acid by irradiation with active light or radiation, and a compound expressed by formula (I). In formula (I) Z is a 2-14C hydrocarbon group; A is a 3-14C hydrocarbon group; and W is H, 1-12C alkyl, 2-12C alkylalkoxy or a group expressed by formula (II) (wherein X is a bivalent linking group; R is H, 1-6C alkyl or 3-6C cycloalkyl; Y is an atom required for forming a 3-12C alicyclic hydrocarbon group; and l is 0 or 1). COPYRIGHT: (C)2011,JPO&INPIT