摘要:
A process for producing an optically active olefin represented by a formula ##STR1## wherein R.sup.1 represents an organic group and X represents a polycyclic carbon ring group, by reacting a corresponding optically active ester derivative represented by a formula ##STR2## wherein R.sup.1 and X are as defined above and R represents a hydrogen atom, an alkoxy group, an alkenyloxy group or a substituted or unsubstituted aralkyloxy group, with formic acid or a salt thereof in the presence of a catalyst comprising a palladium salt and a tertiary phosphine.Said process makes it possible to produce, at a high yield at a high selectivity, an optically active olefin which has a physiological activity and is useful as a medicine or is useful as an intermediate for the synthesis of physiologically active steroids. Further, said process uses no harmful reagent such as mercury or the like. Thus, it is advantageous as an industrial process.
摘要:
According to the present invention, a process for the preparation of a cyclopropylacetylene derivative represented by the following formula (III): ##STR1## is provided, which comprises reacting a cyclopropylacrylic acid derivative represented by the following formula (I): ##STR2## with a halogenating agent to obtain a halogenocyclopropylpropionic acid derivative represented by the following formula (II): ##STR3## and reacting the halogenocyclopropylpropionic acid derivative with a base.
摘要:
A cubic liquid crystal composition comprising at least one amphiphilic compound having the following general formula (1) and having an IV/OV value of 0.65 to 0.95, and water or an aqueous medium: wherein R represents a hydrophilic group; X and Y each independently represent a hydrogen atom or together form an oxygen atom; n is an integer of 0 to 4; and m is an integer of 0 to 3.
摘要:
A pyridine alcohol derivative represented by General Formula III ##STR1## (where A represents a divalent organic group which may contain one to three oxygen atoms, nitrogen atoms and/or sulfur atoms, wherein A may form a 5-, 6-, 7-, or 8-membered ring together with two bonded carbon atoms, where said ring may form a condensed ring with one or more additional rings; R.sup.5 represents a hydrogen atom, --CHR.sup.1 R.sup.2, or an alkenyl group, an aryl group or an aralkyl group which may be substituted; R.sup.1 and R.sup.2 each independently represent a hydrogen atom or a hydrocarbon group which may be substituted; and R.sup.6 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or an aralkyl group which may be substituted), is produced by:reacting a pyridine ester derivative represented by General Formula I-1 ##STR2## (where Z.sup.1 represents --COX; X represents an alkoxyl group, an alkenyloxy group, an aryloxy group or an aralkyloxy group which may be substituted; and A is the same as above)with a reducing agent, an alkylating agent, an alkenylating agent, an arylating agent or an aralkylating agent to obtain a pyridine carbonyl derivative represented by General Formula II ##STR3## (where A and R.sup.5 are the same as above); and reacting the resulting pyridine carbonyl derivative with a reducing agent, an alkylating agent, an alkenylating agent, an arylating agent or an aralkylating agent to obtain the pyridine alcohol derivative of the General Formula III.
摘要翻译:由通式III表示的吡啶醇衍生物(其中A表示可含有1-3个氧原子的二价有机基团,氮原子和/或硫原子,其中A可以形成5-,6-,7-或8- 其中所述环可以与一个或多个另外的环形成稠环; R 5表示氢原子,-CHR 1 R 2或链烯基,芳基或可被取代的芳烷基 ; R 1和R 2各自独立地表示氢原子或可以被取代的烃基; R 6表示氢原子,烷基,链烯基,芳基或可被取代的芳烷基)由 :使由通式I-1表示的吡啶酯衍生物(其中Z1表示-COX; X表示烷氧基,烯氧基,芳氧基或可被取代的芳烷氧基),A与上述相同) 用还原剂, 烷基化剂,烯化剂,芳基化剂或芳烷基化剂,得到通式II所示的吡啶羰基衍生物(其中A和R5与上述相同); 并使所得到的吡啶羰基衍生物与还原剂,烷化剂,烯化剂,芳基化剂或芳烷基化剂反应,得到通式Ⅲ的吡啶醇衍生物。
摘要:
A pyridine alcohol derivative represented by General Formula III (where A represents a divalent organic group which may contain one to three oxygen atoms, nitrogen atoms and/or sulfur atoms, wherein A may form a 5-, 6-, 7-, or 8-membered ring together with two bonded carbon atoms, where said ring may form a condensed ring with one or more additional rings; R6 represents a hydrogen atom, —CHR1R2, or an alkenyl group, an aryl group or an aralkyl group which may be substituted; R1 and R2 each independently represent a hydrogen atom or a hydrocarbon group which may be substituted; and R represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or an aralkyl group which may be substituted), is produced by: reacting a pyridine ester derivative represented by General Formula I-1
摘要翻译:由通式III表示的吡啶醇衍生物(其中A表示可含有1-3个氧原子的二价有机基团,氮原子和/或硫原子,其中A可以形成5-,6-,7-或8- 其中所述环可以与一个或多个另外的环形成稠环; R 6表示氢原子,-CHR 1 R 2或链烯基,芳基或可被取代的芳烷基 ; R 1和R 2各自独立地表示氢原子或可被取代的烃基; R表示氢原子,烷基,烯基,芳基或可被取代的芳烷基)由 :使由通式I-1表示的吡啶酯衍生物反应
摘要:
According to the present invention, provided are (1) a process for the preparation of 2-chloro-5-chloromethyl-1,3-thiazole, by reacting 3-chloro-1-isothiocyanato-1-propene with a chlorinating agent, (2) a process for the preparation of 3-chloro-1-isocyanato-1-propene, by rearranging 3-chloro-1-thiocyanato-2-propene in the presence of a salt of one or more than one metal selected from the group consisting of metals belonging to Group 2A, Group 7A, Group 8 and Group 1B of the long-form periodic table, and (3) a process for the preparation of 3-chloro-1-thiocyanato-2-propene, by reacting 1,3-dichloropropene and a thiocyanate salt (a) in the presence of water, (b) in the presence of an organic solvent which is water-soluble and has a boiling point of 150° C. or lower, or (c) in an organic solvent in the presence of a phase transfer catalyst.
摘要:
Cyclohexanetriol derivatives represented by the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different, and each denotes a hydrogen atom or a protecting group of a hydroxyl group,X denotes an oxygen atom, .dbd.CHCH.sub.2 OR.sup.4, .dbd.CHCHO or .dbd.CHCO.sub.2 R.sup.5, Y denotes a hydrogen atom and Z denotes --OR.sup.6, or Y and Z together form a single bond; or X and Z together form .dbd.NO--, .dbd.CHCH(OR.sup.7)O-- or .dbd.CHCO.sub.2 -- and Y is a hydrogen atom, R.sup.4 and R.sup.6 denote a hydrogen atom or a protecting group of a hydroxyl group respectively, R.sup.5 denotes a lower alkyl group, and R.sup.7 denotes a hydrogen atom or a lower alkyl group.Said derivatives are useful as synthetic intermediates of 1-hydroxyvitamin D derivatives.
摘要:
11.beta.,17.alpha.,21-Trihydroxy-1,4-pregnadiene-3,20-dione 21-[(E,E)-3,7,11-trimethyl-2,6,10-dodecatrienoate] of the formula ##STR1## an antiinflammatory composition thereof and a method for the production thereof.11.beta.,17.alpha.,21-Trihydroxy-1,4-pregnadiene-3,20-dione 21-[(E,E)-3,7,11-trimethyl-2,6,10-dodecatrienoate] of the present invention exhibits remarkably excellent antiinflammatory action and besides, displays reduced side effects and can be produced in high selectivity and good yield and conveniently.
摘要:
There is provided a class of novel 3,4-dihydro-2H-benzopyran derivatives which either have excellent inhibitory activity against unfavorable effects of heat, light and oxidative factors or are of use as precursors of compounds having such activity, and methods for producing these derivatives. Also provided are methods of using such 3,4-dihydro-2H-benzopyran derivatives as stabilizers for organic materials sensitive to heat, light or/and oxidative factors, and organic compositions containing such stabilizers.