Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a substituted phenylacetic acid and ester-based derivatives thereof.SOLUTION: Phenylacetic acid ester or a compound comprising an analogous structure thereof is manufactured by taking a toluene, such toluene as is substituted with various kinds of substituents, alcohol, oxidizing agent, and carbon monoxide as the starting materials, and by using a complex catalyst formed from a transition metal and ligand. The phenylacetic acid ester or a compound comprising an analogous structure thereof is hydrolyzed into various kinds of substituted phenylacetic acid-based compounds. These compounds are widely applied as important, fine chemical products in the industries for pesticides, pharmaceuticals, perfumes, and the like.
Abstract:
A compound represented by the following general formula (I): [wherein R 1 represents hydrogen atom, or an alkyl group, R 2 represents a hydroxyalkyl group, or a triarylmethyloxyalkyl group, or R 1 and R 2 combine together to represent-C(R3)(R 4 )- (R 3 and R 4 represent hydrogen atom, an alkyl group, or hydroxyl group, or R 3 and R 4 may combine together to represent oxo group), or -C(R 5 )(R 6 )-O-C(R 7 )(R 8 )- (R 5 to R 8 represent hydrogen atom, an alkyl group, or hydroxyl group, or R 5 and R 6 may combine together to represent oxo group, and R 7 and R 8 may combine together to represent oxo group); Ar 1 to Ar 4 independently represent an aryl group (the aryl group may have 1 to 5 of the same or different substituents), *1 to *4 indicate asymmetric carbons, and configurations are cis between *1 and *2, cis between *3 and *4, and trans between *2 and *3]. An optically active phosphine ligand which can be easily synthesized and gives a transition metal complex showing superior asymmetric catalyst activity is provided.
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive hydroxide group protection agent being stable and easily usable and exhibiting no carcinogenicity and lachrymatory properties, and to provide a hydroxide group protection method capable of protecting a hydroxide group under an acidic condition.SOLUTION: The hydroxide group protection agent is a nitrogen-containing electron-attracting heterocycle bonded with at least one protection group through an oxygen atom, a sulfur atom or a nitrogen atom. The heterocycle is, for example, a triazine ring, and the protection group is, for example, a benzyl group. The hydroxide group protection agent is specifically 2,4,6-tribenzyloxy-1,3,5-triazine, 2,4,6-tris(4-methoxybenzyloxy)-1,3,5-triazine and the like. 2,4,6-tris(t-butoxy)-1,3,5-triazine and the like are additionally usable. In hydroxide group protection, a hydroxide group protection agent is reacted with an object compound having a hydroxide group under an acidic condition.