公开(公告)号：US4983751A

公开(公告)日：1991-01-08

申请号：US345369

申请日：1989-01-31

申请人： Kenji Hirai ,  Takamasa Futikami ,  Atsuko Murata ,  Hiroaki Hirose ,  Masahiro Yokota ,  Shoin Nagato

发明人： Kenji Hirai ,  Takamasa Futikami ,  Atsuko Murata ,  Hiroaki Hirose ,  Masahiro Yokota ,  Shoin Nagato

IPC分类号： A01N43/76 ,  C07D263/44

CPC分类号： C07D263/44 ,  A01N43/76

摘要： Disclosed are novel oxazolidinedione derivatives expressed by the following formula: ##STR1## (R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 being defined in the specification), a method of producing the derivatives and herbicides containing the derivatives as an active ingredient. Carbonate esters which are intermediates in the method of producing the oxazolidinedione derivatives are also disclosed.These novel derivatives exhibit excellent weed-killing activity for harmful weeds and low phytotoxicity for crops.

公开(公告)号：US4648129A

公开(公告)日：1987-03-03

申请号：US641709

申请日：1984-08-17

申请人： Kenji Hirai ,  Hideki Torizuka

发明人： Kenji Hirai ,  Hideki Torizuka

IPC分类号： H03D9/06 ,  H03D7/02 ,  H03J1/10

CPC分类号： H03D7/02

摘要： A frequency converter includes a mixer, a local oscillator connected to the mixer by a line which transmits a local oscillator signal to the mixer and a starter circuit for supplying a transient bias current to the mixer for insuring the start of the local oscillations.

摘要翻译： 变频器包括混频器，通过将本地振荡器信号发送到混频器的线路连接到混频器的本地振荡器和用于向混频器提供瞬态偏置电流以确保本地振荡的开始的启动器电路。

公开(公告)号：US4497964A

公开(公告)日：1985-02-05

申请号：US441853

申请日：1982-11-15

申请人： Iwao Ojima ,  Kenji Hirai

发明人： Iwao Ojima ,  Kenji Hirai

IPC分类号： C07C231/00 ,  B01J31/00 ,  B01J31/12 ,  B01J31/16 ,  B01J31/20 ,  C07C51/12 ,  C07C67/00 ,  C07C231/12 ,  C07C233/47

CPC分类号： C07C231/12 ,  B01J31/0212 ,  B01J31/20 ,  B01J2231/34 ,  B01J2531/845

摘要： A process for the production of an N-acyl-.alpha.-amino acid represented by the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, independently from each other, represent a hydrogen atom, an alkyl or cycloalkyl group which may be substituted, or an aryl or heteroaromatic group selected from the group consisting of furyl, pyrrolyl, pyridinyl, thienyl and indolyl which may be substituted, which comprises reacting an oxirane represented by the general formula ##STR2## wherein R.sup.1 and R.sup.2 are as defined above, an amide compound represented by the general formulaR.sup.3 CONHR.sup.4 (III)wherein R.sup.3 and R.sup.4 are as defined above, and carbon monoxide in the presence of hydrogen, a cobalt-containing catalyst, and a promoter composed of a compound containing a metal selected from Groups I, II, III and IV of the periodic table.

摘要翻译： 由通式（I）表示的N-酰基-α-氨基酸的制备方法，其中R 1，R 2，R 3和R 4彼此独立地表示氢原子，烷基或环烷基 或者可以被取代的芳基或杂芳基，或者可以被取代的呋喃基，吡咯基，吡啶基，噻吩基和吲哚基的芳基或杂芳族基，其中包括使通式（II）表示的环氧乙烷与式 R2如上定义，由通式R 3 CONHR 4（III）表示的酰胺化合物，其中R 3和R 4如上所定义，一氧化碳在氢存在下，含钴催化剂和由含有 选自周期表第I，II，III和IV族的金属。