公开(公告)号：US5183907A

公开(公告)日：1993-02-02

申请号：US784743

申请日：1991-10-29

申请人： Stuart P. Briggs

发明人： Stuart P. Briggs

IPC分类号： C07D307/87

CPC分类号： C07D307/87

摘要： Diphenyl ether derivatives of formula II ##STR1## wherein R.sub.1 represents a hydrogen or halogen atom or an alkyl or haloalkyl group, R.sub.2 and R.sub.3, which may be the same or different, each independently represents a hydrogen or halogen atom, or an alkyl, haloalkyl, nitro or cyano group, and R.sub.6 represents a hydrogen atom or an alkyl group, useful as intermediates in the preparation of diphenyl ether herbicides, are prepared by treating a compound of formula III ##STR2## where R.sub.1, R.sub.2 and R.sub.3 are as defined above with a dicarboxylic acid of formula R.sub.6 --CH(COOH).sub.2, where R.sub.6 is as defined above, in the presence of an organic base.

摘要翻译： 式II的二苯醚衍生物其中R 1表示氢或卤原子或烷基或卤代烷基，其中R 2和R 3可以相同或不同，各自独立地表示氢或卤素原子，或 烷基，卤代烷基，硝基或氰基，R6表示氢原子或烷基，可用作制备二苯醚除草剂的中间体，通过将式III化合物（III）进行处理，其中R1，R2 和R 3如上所定义，在有机碱的存在下，与式R6-CH（COOH）2的二羧酸（其中R 6如上所定义）相同。

公开(公告)号：US4927945A

公开(公告)日：1990-05-22

申请号：US230104

申请日：1988-08-09

申请人： Stuart P. Briggs ,  Derek A. Wood

发明人： Stuart P. Briggs ,  Derek A. Wood

IPC分类号： C07D307/87 ,  C07D307/88 ,  C07D307/89

CPC分类号： C07D307/89 ,  C07D307/88

摘要： Diphenyl ether derivatives of formula II ##STR1## wherein R.sub.1 represents a hydrogen or halogen atom or an alkyl or haloalkyl group, R.sub.2 and R.sub.3, which may be the same or different, each independently represents a hydrogen or halogen atom, or an alkyl, haloalkyl, nitro or cyano group, R.sub.4 represents an alkyl group and X represents an oxygen or sulphur atom, useful as intermediates in the preparation of diphenyl ether herbicides, are prepared by treating a compound of formula III ##STR2## where R.sub.1, R.sub.2, R.sub.3 and X are as defined above and R.sub.6 is a hydrogen atom or an alkyl group, with an alkali under hydrolyzing conditions.

公开(公告)号：US4482626A

公开(公告)日：1984-11-13

申请号：US594945

申请日：1984-03-30

申请人： Peter J. Twist ,  Joseph Bailey ,  Stuart P. Briggs ,  Miroslav V. Mijovic ,  David T. Southby

发明人： Peter J. Twist ,  Joseph Bailey ,  Stuart P. Briggs ,  Miroslav V. Mijovic ,  David T. Southby

IPC分类号： G03C7/32 ,  G03C7/392 ,  G03C7/413 ,  G03C5/30

CPC分类号： G03C7/413 ,  G03C7/39208

摘要： Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine are stabilized by incorporating therein certain polyamino stabilizing agents, such as N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid. Decomposition of the hydroxylamine, in the presence of heavy metals such as iron which act to catalyze the decomposition, and resultant formation of ammonia is effectively prevented by the presence in the developer composition of such stabilizing agents. Undesirable precipitate formation is also effectively avoided.

摘要翻译： 含有主芳香族氨基显色剂和羟胺的摄影彩色显影剂组合物通过掺入某些聚氨基稳定剂如N，N'-双（2-羟基苄基）乙二胺-N，N'-二乙酸来稳定。 在这种稳定剂的显影剂组合物中的存在下，有效地防止了在存在催化分解作用的催化分解的重金属如铁的情况下羟胺的分解。 也有效地避免了不希望的沉淀物形成。