摘要:
This invention relates to a method comprising reacting an amino acid derivative of the following general formula (I); ##STR1## (wherein R.sup.1 represents an amino-protective group; R.sup.0 represents hydrogen or, taken together with R.sup.1, represents an amino-protecting group; R.sup.2 represents a carboxy-protecting group; X represents a leaving group) with a thiol compound of the following general formula (II):R.sup.3 SH (II)(wherein R.sup.3 represents an alkyl group of 1 to 7 carbon atoms, an aryl group of 6 to 10 carbon atoms, or an aralkyl group of 7 to 10 carbon atoms) to give a cysteine derivative of the following general formula (III): ##STR2## (wherein R.sup.0, R.sup.1, R.sup.2, and R.sup.3 are as defined above), wherein the reaction is conducted in the presence of a base and water in an organic reaction solvent.
摘要:
A process for producing optically active cysteine derivatives with high optical purity and good quality which is economically advantageous and is high in productivity even on a commercial scale is provided. A process for producing an optically active cysteine derivative which comprises synthesizing a D-form or L-form optically active cysteine derivative of the general formula (2) shown below (R1 represents an amino-protecting group of the urethane or acyl type, R0 represents a hydrogen atom or, taken together with R1, an amino-protecting group, R2 represents an alkyl, aryl or aralkyl group, R3 represents a univalent organic group and * represents the position of an asymmetric carbon) by reacting the corresponding D-form or L-form optically active amino acid derivative of the general formula (1) shown below with an alcohol of the general formula (3) shown below and a strong acid and/or a thionyl halide and recovering the above cysteine derivative (2) from the reaction mixture, the procedural series from reaction to recovery being carried out under conditions such that the medium contacting the above optically active cysteine derivative (2) is within the range from acidic to weakly basic to thereby recover the above cysteine derivative (2) from the reaction mixture while suppressing the decomposition and racemization thereof.
摘要:
This invention provides a process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives, which are of value as intermediates of drugs, from inexpensive starting materials without using any special equipment such as that required for super-low temperature reactions. A process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives which comprises reacting an acetic acid derivative at a temperature of not less than −30° C. with an enolate prepared by permitting either a base or a metal having a valency of 0 to act on the derivative to produce a hydroxyoxohexanoic acid derivative, reducing this compound with the aid of a strain of microorganism to provide a halomethyldioxanylacetic acid derivative, treating this compound with an acetalizing agent in the presence of an acid catalyst to provide a halomethyldioxanylacetic acid derivative, reacted with an acyloxylating agent to provide a acyloxymethyldioxanylacetic acid derivative, and subjecting this compound to solvolysis in the presence of a base.
摘要:
This invention provides a process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives, which are of value as intermediates of drugs, from inexpensive starting materials without using any special equipment such as that required for super-low temperature reactions.A process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives which comprises reacting an acetic acid derivative at a temperature of not less than −30° C. with an enolate prepared by permitting either a base or a metal having a valency of 0 to act on the derivative to produce a hydroxyoxohexanoic acid derivative, reducing this compound with the aid of a strain of microorganism to provide a halomethyldioxanylacetic acid derivative, treating this compound with an acetalizing agent in the presence of an acid catalyst to provide a halomethyl-dioxanylacetic acid derivative, reacted with an acyloxylating agent to provide a acyloxymethyldioxanylacetic acid derivative, and subjecting this compound to solvolysis in the presence of a base.
摘要:
The invention is a formed article including a gas barrier layer, the gas barrier layer including a surface layer part that is formed of a material that includes at least a carbon atom, an oxygen atom, and a silicon atom, the surface layer part having a carbon atom content rate of more than 0 and not more than 70%, an oxygen atom content rate of 10 to 70%, a nitrogen atom content rate of 0 to 35%, and a silicon atom content rate of 20 to 55%, based on a total content rate of carbon atoms, oxygen atoms, nitrogen atoms, and silicon atoms; a method for producing the formed article; an electronic device member including the formed article; and an electronic device comprising the electronic device member. The formed article of the invention exhibits an excellent gas barrier capability, excellent transparency, and excellent bending resistance. The method for producing a formed article of the invention can efficiently, safely, and conveniently produce the formed article of the invention. The electronic device member of the invention may suitably be used for electronic devices such as displays and solar cells.
摘要:
A circuit board laminate includes a metal substrate, an insulation layer disposed on the metal substrate, and a metal foil disposed on the insulation layer. A metal-based circuit board includes a metal substrate, an insulation layer disposed on the metal substrate, and a circuit pattern disposed on the insulation layer. The insulation layer contains a liquid crystal polyester and 50% by volume or more of an inorganic filler. The inorganic filler is made of boron nitride and at least one of aluminum nitride and aluminum oxide. A proportion of boron nitride in the inorganic filler is within a range of 35 to 80% by volume.
摘要:
The present invention provides a luminescent composition which is capable of providing an inorganic electroluminescent sheet with a high productivity at low costs in an efficient manner, and has a desired light transmittance (transparency) when no electric voltage is applied thereto, an inorganic electroluminescent sheet obtained from the luminescent composition which can be mass-produced, and a process for producing the inorganic electroluminescent sheet. The present invention relates to a luminescent composition including an inorganic electroluminescent substance and a binder resin, wherein a content of the inorganic electroluminescent substance is not less than 0.5 part by mass and less than 100 parts by mass on the basis of 100 parts by mass of the binder resin; and an inorganic electroluminescent sheet including at least a first transparent substrate, a first transparent electrode, an inorganic electroluminescent layer, a first transparent electrode and a second transparent substrate which are successively laminated in this order, wherein the inorganic electroluminescent layer is formed from the above luminescent composition, and the inorganic electroluminescent sheet has a light transmittance of 60% or more as measured at a wavelength of 550 nm under a non-light emitting condition.
摘要:
The present invention provides a gas barrier film including a base layer, and a gas barrier layer that is provided on at least one side of the base layer, the base layer including a resin having a glass transition temperature (Tg) of more than 130° C., the gas barrier layer being formed of a material that includes at least an oxygen atom and a silicon atom, a surface layer part of the gas barrier layer having an oxygen atom content rate of 60 to 75%, a nitrogen atom content rate of 0 to 10%, and a silicon atom content rate of 25 to 35%, based on a total content rate of oxygen atoms, nitrogen atoms, and silicon atoms, and the surface layer part of the gas barrier layer having a film density of 2.4 to 4.0 g/cm3. Also provided are a process for producing the same, an electronic device member that includes the gas barrier film, and an electronic device that includes the electronic device member. The gas barrier film of the invention exhibits an excellent gas barrier capability, excellent transparency, excellent bending resistance, and excellent heat resistance.
摘要翻译:本发明提供了一种阻气膜,其包括基底层和设置在基底层的至少一侧的阻气层,所述基底层包括玻璃化转变温度(Tg)大于130°的树脂 气体阻隔层由至少包含氧原子和硅原子的材料形成,阻气层的氧原子含有率为60〜75%的表层部分,氮原子含有率 为0〜10%,硅原子含有率为25〜35%,基于氧原子,氮原子和硅原子的总含有率,阻气层的表层部分的膜密度为 2.4〜4.0g / cm 3。 还提供了制造该方法的方法,包括阻气膜的电子器件部件和包括该电子器件部件的电子器件。 本发明的阻气膜表现出优异的阻气性,优异的透明性,优异的耐弯曲性和优异的耐热性。
摘要:
A power conversion device in which an inverter for controlling a load is connected to an alternating current power system, and arranged to perform an electric power assist by connecting a direct-current power assist device having a chopper and a charge device to a direct-current circuit of the inverter. The device including a setting section to set charge and discharge target values in accordance with a sensed value of the direct-current voltage of the inverter; a charge control section to perform a charge control based on the charge target value; a discharge control section to perform a discharge control based on the discharge target value; and an instantaneous-low high-speed-compensation section to estimate an electric power corresponding to a direct-current sensed voltage of the inverter, and to output a value to the discharge control section which is obtained by dividing the estimated value by the direct-current sensed voltage.
摘要:
Provided a formed article comprising a layer that includes a polysilazane compound and a clay mineral, and having a water vapor transmission rate at a temperature of 40° C. and a relative humidity of 90% of 6.0 g/m2/day or less. Also provided are a method for producing the formed article, an electronic device member including the formed article, and an electronic device including the electronic device member. The formed article exhibiting an excellent gas barrier capability, excellent transparency, and excellent bending resistance, a method for producing the formed article, and an electronic device member, or the like, comprising the formed article are provided.
摘要翻译:提供一种成型体,其包括含有聚硅氮烷化合物和粘土矿物的层,并且在40℃的温度和90%的相对湿度为6.0g / m 2 /天以下的水蒸气透过率。 还提供了一种用于生产成型物品的方法,包括成形物品的电子设备构件和包括该电子设备构件的电子设备。 提供了具有优异的阻气性,优异的透明性和优异的抗弯曲性的成型体,成型体的制造方法以及电子器件部件等。