摘要:
The present invention relates to an optically active borane complex represented by the general formula, ##STR1## wherein R.sup.1 represents an aryl group, R.sup.2 represents an alkyl group and a mark * means an asymmetric carbon, and a method for producing optically active alcohol derivatives by the reduction of prochiral ketones with said borane complex. The optically active alcohol derivative is useful for fungicides, herbicides or plant growth regulators.
摘要:
In a Reimer-Tiemann reaction for the preparation of a mixture of salicylaldehyde and p-hydroxybenzaldehyde, improved yield of the product and high selectivity of salicylaldehyde can be obtained when an alkali metal salt of a phenol is reacted with a reaction mixture comprised of chloroform and a slurry of an alkali metal hydroxide (preferably, in a fine powder state thereof) and an inert organic solvent and optionally, a catalytic amount of a surfactant.
摘要:
A process for producing 5-methylfurfural by reducing 5-chloromethylfurfural which is used as a starting material or to be obtained by decomposing glucides commercially available more cheaply with hydrochloric acid, with hydrogen in an organic solvent in the presence of a palladium catalyst.
摘要:
A solid-state imaging device includes: an imaging unit wherein a plurality of light sensing units formed in a matrix and a plurality of interconnections are formed among the plurality of light sensing units; a color filter that is disposed over the imaging unit, and delivers colors to the light sensing units in accordance with a predefined rule; and on-chip lenses that are disposed corresponding to the light sensing units on a one-by-one basis over the color filter, and have light-collection characteristics varying in accordance with differences among sensitivities of the light sensing units, where the differences among the sensitivities of the light sensing units are generated, when the same colors are delivered to the light sensing units in accordance with the same rule, owing to the fact that positions of the individual interconnections relative to the light sensing units vary periodically.
摘要:
A system for helping the production of a desired translation by aiding the operator to make revisions within the text results of each stage of the translation process. The system achieves this goal by receiving text inputted by the operator and conferring IDs to each character of text, and for this text, successively proceeding through morphological analysis, conferring of equivalents to content words, and conversion of sentence structure to that of the target language while referring to a dictionary/grammar section and conferring IDs to corresponding language units. Text corresponding to each stage is stored and moreover, the stage to which translation has advanced is detected, and upon receiving a designation as to which translation stage the operator wishes to have displayed, outputted text of the translation process designated by the operator is copied from the corresponding buffer if the most advanced translation process at that time is beyond the designated translation stage. If the operator here designates a portion of this text, the buffer of the display stage designated by the operator is referred to, and the corresponding portion is copied and displayed.
摘要:
The present invention relates to an asymmetrically modified borohydride type compound obtained by reacting an optically active amino alcohol represented by the formula, ##STR1## or its salt with an acid with a borohydride compound; its production method; and a method for producing an optically active alcohol derivative useful as fungicides, herbicides or plant growth regulators and represented by the formula, ##STR2## which comprises asymmetrically reducing a ketone compound represented by the formula, ##STR3## with the asymmetrically modified borohydride type compound.
摘要:
The present invention relates to an asymmetrically modified borohydride type compound obtained by reacting an optically active amino alcohol represented by the formula, ##STR1## or its salt with an acid with a borohydride compound; its production method; and a method for producing an optically active alcohol derivative useful as fungicides, herbicides or plant growth regulators and represented by the formula, ##STR2## which comprises asymmetrically reducing a ketone compound represented by the formula, ##STR3## with the asymmetrically modified borohydride type compound.
摘要:
A 4-hydroxybenzaldehyde derivative of the formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is selected from the group consisting of hydrogen atom, halogen atoms, lower alkyl groups or lower alkoxy groups, which is useful as intermediate for the production of medicines or agricultural chemicals, or as flavor, is produced by the reaction of a p-cresol derivative of the formula: ##STR2## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is as defined above, with oxygen or oxygen-containing gas in the presence of a base and a catalytic amount of cobalt compound or metallic cobalt.
摘要:
A process for producing 5-halomethylfurfural represented by the formula, ##STR1## wherein X is Cl or Br, which comprises carrying out a acid-decomposition of saccharide in a water/organic solvent/magnesium halide system with hydrochloric acid, sulfuric acid, hydrogen chloride or other mineral acid in the presence or absence of surface active agent as a catalyst. The 5-halomethylfurfural is useful as an intermediate of medicines, agricultural chemicals, perfumes and the like.
摘要:
A support structure of a loudspeaker unit is constructed to prevent transmission of vibrations of the loudspeaker unit to a cabinet so that the quality of sound can be improved, and so as to have excellent stability in its assembled condition. The support structure includes a cabinet having an opening in which the front side of the loudspeaker unit is located, an anchor to be connected to the backside of the loudspeaker unit, a support for supporting the anchor so that the center of gravity of the anchor inside the cabinet is fixed, and a positioning member for positioning the support. The support structure also includes a cushioning member that is fitted between the support and the positioning member.