摘要:
3-Formyltetrahydrofuran is prepared by reacting 2,5-dihydrofuran with hydrogen and carbon monoxide in the presence of a group VIII metal compound and tris(2-t-butyl-5-methylphenyl) phosphite.
摘要:
A tetrahydrofuran-compound is disclosed herein which is represented by the formula (1) ##STR1## wherein each of X.sub.1 and X.sub.2 is a hydrogen atom or a methyl group, Y is a hydrogen atom or a carbonyl group substituted by a lower alkyl group (Y') having 1 to 4 carbon atoms, i.e., an acyl group (--COY'), andn is 2 or 3,and an insecticide containing the tetrahydrofuran-compound as an effective component.
摘要:
The present invention relates to novel (tetrahydro-3-furanyl)methylamino derivatives of the following formula (1): ##STR1## wherein the variables are defined in the specification, which are useful as insecticides.
摘要:
The present invention relates to novel N-vinylimidazolidine derivatives of the following formula (1), a process for producing them, an insecticide containing the derivatives as an effective ingredient, and novelintermediates. The derivatives (1) are useful as agricultural chemicals (particularly, as insecticides) in the fields of agriculture, and the intermediates are useful in various industrial fields, especially as intermediates for agricultural chemicals. ##STR1## where R.sup.1, R.sup.2, Z are as defined in the specification.
摘要:
Novel dialkoxymethylimidazolidine derivatives of the formula (1) ##STR1## are described. Also, a preparation process of the derivatives and insecticidal compositions comprising the same are set forth. In addition, novel intermediate compounds of the formula (2) useful in preparing the derivatives of the formula (1) are also described along with their preparation process ##STR2##
摘要:
Herein disclosed are novel imidazolidine derivatives of the formula (I) and intermediates of the formula (II) ##STR1## wherein each R represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a halogen atom, an alkoxy group having from 1 to 6 carbon atoms, a methylenedioxy group, an alkylthio group having from 1 to 4 carbon atoms, a haloalkyl group having from 1 to 2 carbon atoms, a haloalkoxy group having from 1 to 4 carbon atoms, an alkylcarbonyl group having from 1 to 6 carbon atoms, an alkoxycarbonyl.group having from 1 to 6 carbon atoms, a hydroxy group, a cyano group, a nitro group, an alkylamino group having from 1 to 8 carbon atoms, a phenyl group, a phenoxy group, a benzyl group or a halopyridylmethyloxy group, and n is an integer of from 1 to 3, ##STR2## wherein R and n have, respectively, the same meanings as defined above. Processes for preparing the compounds of the formulas (I) and (II) are also described. Moreover, insecticidal compositions comprising an effective amount of the derivative (I) are described.
摘要:
The present invention relates to novel (tetrahydro-3-furanyl)methylamino derivatives of the following formula (1): ##STR1## wherein the variables are defined in the specification, which are useful as insecticides.
摘要:
Novel dialkoxymethylimidazolidine derivatives of the formula (1) ##STR1## are described. Also, a preparation process of the derivatives and insecticidal compositions comprising the same are set forth. In addition, novel intermediate compounds of the formula (2) useful in preparing the derivatives of the formula(1) are also described along with their preparation process ##STR2##
摘要:
A overedge sewing machine comprises: drive mechanisms for selectively carrying out a hemstitch sewing operation and flat stitch and double-chain stitch sewing operations; a needle plate having a stitch finger, a guide needle piece and a stitch tongue reciprocatable between an operation position and a non-operation position outside the needle plate claw and guide needle; and three needles mounted removably thereon in such a manner that the three needles are arranged in parallel to each other substantially on a straight line, wherein a needle point which is used in common with the overedge sewing operation and the flat stitch and double-chain stitch sewing operations is positioned between the stitch tongue and the guide needle piece respectively provided in the needle plate.
摘要:
The tape recorder is provided with a cassette guiding device including a tiltable cassette loading platform pivotably mounted at one end, spring means for normally holding the platform in an inclined position for receiving an inserted cassette and for permitting the platform to rotate to the horizontal position, a guide member for loading the cassette at an operating position when the platform is rotated to the horizontal position. A cassette containing chamber is formed by a cassette inserting section provided with an opening for passing the cassette, a door for normally closing the opening and shoulders for guiding the cassette to the platform, and a cassette loading section containing the cassette loading platform. There is provided a door operating mechanism including a door locking member for locking the door in the opened position, a sliding member interlocked with the door locking member, and a door operating button mounted on the sliding member for causing the door locking member to release the door. There is also provided a cassette ejecting mechanism including an ejecting button interlocked with the door such that the ejecting button is operable when the door is opened but not operable when the door is closed and a cassette push-up lever operated by the ejecting button for returning the cassette loading platform to the inclined position.