摘要:
A process for producing an optically active .beta.-hydroxyketone represented by formula (I): ##STR1## by catalytic asymmetrical aldol reaction is disclosed, comprising reacting a silyl-enol ether represented by formula (II): ##STR2## with a substituted aldehyde represented by formula (III):R.sup.5 CHO (III)in the presence of a binaphthol-titanium complex represented by formula (IV): ##STR3## An optically active .beta.-hydroxyketone is efficiently produced with diastereo-specificity and enantio-specificity.
摘要:
A process for producing an optically active dihydropyran derivative represented by formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represents a hydrogen atom, a lower alkyl group, a tri-lower alkylsilylmethyl group, a lower alkoxycarbonylamino group, or an --OR.sup.5 group, wherein R.sup.5 represents a lower alkyl group, a lower acyl group, a lower alkoxycarbonyl group, a di-lower alkylcarbamoyl group, or a tri-lower alkylsilyl group, or R.sup.1 and R.sup.2 are taken together to form a 5- to 7-membered cyclic hydrocarbon group or to form a condensed heterocyclic group with an oxygen atom, or R.sup.2 and R.sup.3 are taken together to form a 5- to 7-membered cyclic hydrocarbon group or to form a condensed heterocyclic group with an oxygen atom, provided that all of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 do not represent hydrogen atoms at the same time; and R.sup.6 represents a lower alkyl group, which comprises reacting a diene compound represented by formula (2): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 have the same meanings as defined above, with a glyoxylic acid ester represented by formula (3): ##STR3## wherein R.sup.6 has the same meaning as defined above, in the presence of a binaphthol-titanium complex represented by formula (4): ##STR4## wherein X represents a chlorine atom or a bromine atom, is disclosed.
摘要:
A process for preparing an .alpha.-hydroxycarboxylate represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group; R.sup.2 represents a lower alkyl group, a phenyl group or a cycloalkyl group, or R.sup.1 and R.sup.2 are bonded to each other to form a five- to seven-membered cycloalkenyl or bicycloalkenyl ring which may be substituted with a lower alkyl group; and R.sup.3 represents a lower alkyl group,which comprises reacting an olefin compound represented by formula (II): ##STR2## wherein R.sup.1 ' represents a hydrogen atom or a lower alkyl group; and R.sup.2 ' represents a lower alkyl group, a phenyl group or a cycloalkyl group, or R.sup.1 ' and R.sup.2 ' are bonded to each other to form a five- to seven-membered cycloalkyl or bicycloalkyl ring which may be substituted with a lower alkyl group,with a glyoxylate represented by formula (III): ##STR3## wherein R.sup.3 is as defined above, in the presence of a binaphthol-titanium complex represented by formula (IV): ##STR4## wherein X represents a chlorine atom or bromine atom.
摘要:
An aromatic compound represented by the general formula Ar1X is reacted with a palladium compound and a phosphine derivative, in the presence of a first basic substance, thereby producing a palladium-complex compound represented by the general formula Ar1—PdL2X. This palladium-complex compound is reacted with a benzoic acid represented by the general formula Ar2—COOH, in the presence of a second basic substance, thereby producing another palladium-complex compound represented by the following general formula. The above palladium-complex compounds are useful as catalysts and can be produced easily by the above reactions. In the above general formulas, Ar1 is an aryl group; and X is a halogen that is fluorine, chlorine, bromine or iodine, trifluoromethanesulfonate group, an alkylsulfonate group having a carbon atom number of 1-4, or a substituted or unsubstituted arylsulfonate group; each L is independently a phosphine ligand; and Ar2 is an aryl group.
摘要:
An aromatic compound represented by the general formula Ar1X is reacted with a palladium compound and a phosphine derivative, in the presence of a first basic substance, thereby producing a palladium-complex compound represented by the general formula Ar1—PdL2X. This palladium-complex compound is reacted with a benzoic acid represented by the general formula Ar2—COOH, in the presence of a second basic substance, thereby producing another palladium-complex compound represented by the following general formula. The above palladium-complex compounds are useful as catalysts and can be produced easily by the above reactions. In the above general formulas, Ar1 is an aryl group; and X is a halogen that is fluorine, chlorine, bromine or iodine, trifluoromethanesulfonate group, an alkylsulfonate group having a carbon atom number of 1-4, or a substituted or unsubstituted arylsulfonate group; each L is independently a phosphine ligand; and Ar2 is an aryl group.
摘要:
In an image reproduction window, an image reproduction area in which images are reproduced, and an operating area in which a slide bar is displayed are provided. When a slider of the slide bar is moved, the number of images to be displayed in one frame in the image reproduction area is increased or decreased in accordance with a position of the slider. The number of images in one frame increases as a displacement amount of the slider increases. When the slider is moved within a range in which the number of images to be displayed in one frame does not change, only a frame change interval is changed while the number of images in one frame is unchanged.
摘要:
The folder name and the file name of an image file recorded on a recording medium such as a DVD medium, etc. correspond to the title number and the chapter number with which the image of the image file is played back in a slide show recorded on recording medium. Therefore, the slide show can be played back on the playback player such as a DVD player, etc., and an image of a desired image file can be easily detected and confirmed.
摘要:
Provided is a method for producing a pattern of an electroconductive member, comprising: a step of forming a resin film on a substrate surface; a step of incorporating the first metal component into the resin by applying to the resin a liquid which contains a complex of a first metal component, which contains also a second metal component different from the first component, and to which a compound forming a complex with the second metal component is contacting or contacted preliminary; and a step of baking the resin film to form the electroconductive member from the first metal component incorporated into the resin film. Thus, the second metal component is prevented from adversely affecting the first metal component to be incorporated into the resin.
摘要:
Date and time information concerning image files included in the folder is obtained, a time range from the oldest image to the newest image is calculated, and the time range is displayed with folder information. For example, data on shot dates and times recorded as associated information concerning the images or time stamps of the files are used to calculate the time range, and the date range is displayed on a folder icon or on a tab portion of the folder icon. Moreover, a file list displayed last time is stored, the stored file list is compared with a current file list, and only if the both file lists are different from each other, the date and time information is obtained for a different file to recalculate the time range. Thus, the user can infer images included in the folder to some extent and easily retrieve a desired image.
摘要:
Serial reproduction digital video data in the form of a slide show can be easily generated from still image data and/or digital video data. Reading means reads still image data sets and/or digital video data sets stored in folders of a memory card, and selection of one of the folders is received. The still image data sets and/or the digital video data sets in the selected folder are arranged in order of photography, and a serial reproduction digital video data set can be generated.