CN1026109C - 取代磺酰二胺类的制备方法 - Google Patents
取代磺酰二胺类的制备方法 Download PDFInfo
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- CN1026109C CN1026109C CN89104270A CN89104270A CN1026109C CN 1026109 C CN1026109 C CN 1026109C CN 89104270 A CN89104270 A CN 89104270A CN 89104270 A CN89104270 A CN 89104270A CN 1026109 C CN1026109 C CN 1026109C
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- KZOJQMWTKJDSQJ-UHFFFAOYSA-M sodium;2,3-dibutylnaphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S([O-])(=O)=O)=C(CCCC)C(CCCC)=CC2=C1 KZOJQMWTKJDSQJ-UHFFFAOYSA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 235000020354 squash Nutrition 0.000 description 1
- YROXIXLRRCOBKF-UHFFFAOYSA-N sulfonylurea Chemical class OC(=N)N=S(=O)=O YROXIXLRRCOBKF-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Abstract
本发明所涉及的是结构式(I)的化合物的制备方法,
结构式(I)中的各基团和符号的意义见说明书部分。它们具有很好的除草或调节植物生长的性能。
Description
已知杂环取代的N-胺磺酰基磺酰脲类有除草和调节植物生长的性能。(EP-A-131258或US-A-4601747)。
然而这些化合物的作用并不总是令人满意的。
人们发现一种新的含杂环的N-磺酰二胺基磺酰胺类(N-sulfonyldiamidosulfonamides)作为除草剂和植物生长调节剂特别合适。
本发明所涉及的是结构式(Ⅰ)化合物和它们的盐类,
其中
R1和R2分别独立地代表H、(C1-C8)烷基、(C2-C8)烯基、(C2-C8)炔基(这些基团能够用一个或多个卤素或者用一个或二个(C1-C4)烷氧基或(C1-C4)烷硫基取代),或者R1和R2分别独立地代表(C1-C4)烷氧羰基(C1-C3)烷基、未取代
的苯基或者用一个或多个(C1-C4)烷基、(C1-C4)烷氧基、(C1-C4)烷硫基、(C1-C4)烷基亚磺酰基、(C1-C4)烷基磺酰基取代的苯基(上述基团的烷基部分能够用多个卤素或者用一个或二个(C1-C4)烷氧基取代)、以及用(C1-C4)烷氧基)羰基、卤素或NO2取代的苯基;或者R1和R2与它们所连接的N原子一起组成下列式子表示的杂环,
其中a相互独立地代表一个从1~3的整数,
R3代表H、(C1-C12)烷基、(C2-C8)烯基、(C2-C8)炔基(这些基团能用一个或多个卤素或者用一个或二个(C1-C4)烷氧基或(C1-C4)烷硫基取代);或R3代表(C1-C4烷氧基)羰基(C1-C3)烷基、或是-(CH2)b苯基(此处的b是一个从0-2的整数),其苯基是未取代的或者用一个或多个(C1-C4)烷基、(C1-C4)烷氧基、(C1-C4)烷硫基、(C1-C4)烷基磺酰基取代的苯基(上述基团的烷基部分能够用一个或多个卤素取代);或R3代表用(C1-C4)烷氧羰基、卤素或NO2取代的苯基;或者R2和R3一起组成一个(C2-C4)亚烷基链,
R4代表H、(C1-C6)烷基、(C2-C8)烯基、(C2-C8)
炔基或(C1-C4)烷氧基,
R5代表下列结构式中的一种基团,
E代表CH或N,
G代表CH2或O,
R6分别独立地代表H、卤素、(C1-C6)烷基、(C1-C6)烷氧基或(C1-C6)烷硫基(上述基团的烷基部分能够用一个或多个卤素或者用一个或二个(C1-C4)烷氧基或(C1-C4)烷硫基取代);或R6是下列基团之一:N(R11)2、(C3-C6)环烷基、-OCHR7COOR11、(C2-C5)烯基、(C2-C4)炔基、(C3-C5)烯氧基或(C3-C5)炔氧基,
R7代表H或(C1-C4)烷基,
R8代表(C1-C4)烷基、-CHF2或CH2CF3,
R9分别独立地代表H、(C1-C4)烷基、(C1-C4)烷氧
基或卤素;
R10代表H、(C1-C4)烷基、-CHF2或-CH2CF3,
R11分别独立地代表H、(C1-C4)烷基、(C2-C4)烯基或(C3-C4)炔基,
R12代表H、(C1-C4)烷基、(C1-C4烷氧基)羰基或(C1-C4)烷氧甲基,
X代表O或S,
Y代表O、S、CH2、NH或N(C1-C4)烷基。
结构式(Ⅰ)的化合物能制成盐,它们是用一种对于农业合适的阳离子置换-SO2-NH基团中的氢而制成的。一般讲这些盐是金属盐类,特别是碱金属或碱土金属盐、适当烷基化的铵或有机胺盐。使化合物(Ⅰ)在0~100℃下溶于惰性溶剂中例如水、甲醇或丙酮,从而制成它们的盐类。制备本发明的盐所合适的碱有(如)碱金属的碳酸盐如碳酸钾、碱金属和碱土金属的氢氧化物、氨或乙醇胺。
结构式(Ⅰ)中优先选择的是R1和R2分别独立地代表H、(C1-C4)烷基的化合物,或R1和R2一起组成下列式子表示的杂环化合物,
,
其中
R3是H、(C1-C6)烷基或(C2-C4)烯基,
R4代表H、(C1-C4)烷基或烯丙基,
R5代表下列结构式的一种基团,
R6分别独立地卤素、(C1-C4)烷基或(C1-C4)烷氧基,后两者可能是卤代的,
E代表CH或H,
Y代表O,
a代表一个从1~3的整数。
特别地,卤素是指F、Cl或Br。卤代(C1-C4)烷基或卤代(C1-C4)烷氧基是指CF3、-CH2CH2Cl、-CH2CH2Br、-CH2CH2CH2Cl、-CF2CF2H、-CF2CFClH、-CH2CHFCF3、-OCHF2、OCF3、OCH2CF3、-OCH2CH2Cl。
本发明还涉及结构式(Ⅰ)的化合物及其盐的制备方法,其特征是,使
(a)结构式(Ⅱ)的化合物与结构式(Ⅲ)的化合物反应,
其中R1、R2、R3与结构式(Ⅰ)的说明中给出的意义相同,但不代表H,
(b)结构式(Ⅳ)的化合物与结构式(Ⅴ)表示的(硫代)甲氨酸酯反应,
其中R1、R2、R3在结构式(Ⅰ)的说明中已给出含意,
其中R13是(C1-C6)烷基、(C1-C4)卤代烷基、或未取代的苯基或者用一个或多个卤素、(C1-C4)烷基或NO2取代的苯基,或
(c)结构式(Ⅵ)的化合物与结构式(Ⅶ)表示的氯磺酰脲反应,
其中R1、R2、R3在结构式(Ⅰ)的说明中已给出含意,
其中R4和R5在结构式(Ⅰ)的说明中已给出含意,如需要,在(a)、(b)或(c)中得到的化合物可以转换成它们的盐类。
方法a)
化合物(Ⅱ)和(Ⅲ)的反应最好在惰性的非质子传递溶剂(如乙腈、二氯甲烷、甲苯、四氢呋喃或二噁烷)中、在0℃至所用溶剂的沸点之间的温度范围内进行。
式(Ⅱ)表示的异(硫代)氰酸砜二胺基磺酰酯(Die Sulfondiamidosulfonyliso(thio)cyanate)是新的化合物,且对X=O的情况,可通过使异氰酸氯磺酰酯(Ⅷ)与式(Ⅵ)表示的磺酰二胺(其中R1、R2、R3的意义与上文所述相同,但不代表氢)、按类似于从文献中已知的反应方法制备,所说文献已知的方法是关于异氰酸氯磺酰酯与磺酰仲胺类反应的方法(DE-A 2,257,240或US-A-3,931,277)。
式(Ⅵ)表示的磺酰二胺是已知的,或可根据原理上已知的方法来制备,可参见(如)Arch.Pharm.314,51(1980);Ann.Chem.729,40(1969);J.Amer.Chem.Soc.66,1242(1944);Chem.Ber.111,1915(1978)。
式(Ⅲ)所示的原料是已知的,或可根据原理上已知的方法制备,如通过使适当的胍基衍生物与适当的取代1,3-二酮进行环化(如见“The chemistry of Heterocyclic Compounds”,Vol,ⅩⅥ(1962)and Supplement Ⅰ(1970)),或通过氰尿酰氯的衍生化(如见“The Chemistry of Heterocyclic Compounds”,L.Rapaport:”S-Triazines and Derivates”(1959))而制备。
方法b)
化合物(Ⅳ)与式(Ⅴ)表示的带杂环的氨基甲酸酯的反应最好在惰性溶剂(如乙腈或二噁烷)中且有叔式有机碱(如1,8-二氮杂双环-5,4,0-十一碳-7-烯(DBU))存在、其温度在20℃至所用溶剂的沸点之间进行(类同于EP-A 44,807)。
进行这个反应所需的式(Ⅳ)所示磺酰胺类是新的化合物,可通过式(Ⅵ)表示的磺酰二胺(其中的R1、R2和R3与式(Ⅰ)中的定义相同)与氨基磺酰氯(ClSO2NH2)的反应而制备。
该反应可采用类似于已知的、使氨基磺酰氯与苯酚类反应的方法来进行,所不同的是,用磺酰二胺(Ⅵ)代替了原来的苯酚。其反应条件与下面文献所述相同,参见J.Chem.Soc.Perkin Ⅰ,678(1982);Phosphorus and Sulfur Vol.20,371(1984)。
式(Ⅴ)所示的氨基甲酸酯是文献公开了的,或可根据文献公开了的方法制备(见EP-A 70,804)。
方法c)
化合物(Ⅵ)和(Ⅶ)的反应最好在惰性非质子传递溶剂如乙腈、二氯甲烷、甲苯、四氢呋喃或二噁烷中,其温度介于-78℃至所用溶剂沸点之间进行。
式(Ⅶ)所示的氯磺酰脲是已知的,或可根据原理上已知的方法来制备(参见如EP-A 39,239)。
本发明的化合物对于经济上重要的单、双子叶有害植物具有很好的广谱除草作用。同样,对难于除去的由根或其它多年生组织中萌发出来的多年生杂草具有同样的效果。在播种前,施用本发明的物质是作芽前还是芽后处理并不重要,它们所获得的效果几乎相同。那些可被本发明化合物控制的单子叶和双子叶杂草种群的一些示范性例子在下面几个地方被提到,但不应理解为本发明化合物仅用于所提到的这些种类。
能得到控制的单子叶杂草种属有(如):野燕麦、黑麦草、看麦娘、虉草、稗、马唐、狗尾草以及一年生的莎草;多年生的种属有(如):冰草、狗牙根、白茅、高梁以及多年生的莎草。
本发明化合物作用谱涉及的双子叶杂草种属有(如):一年生的猪殃殃、堇菜、婆婆纳、野芝麻、繁缕、苋、欧白芥、蕃薯、母菊、茼麻、黄花稔;多年生的旋花、蓟、酸模、蒿等。
本发明的有效成分也能很好地控制在特定的栽培条件下出现在水稻田中的杂草种属如慈姑、泽泻、荸荠、藨草、莎草等。
将本发明的化合物于芽前施于土表,它或是完全抑制杂草实生苗的萌发,或是让杂草长至子叶期,然后中止其生长,3至4周后最终完全死亡。
采用芽后处理方法,把有效成分施于杂草植物的绿色部分,同样在处理后异乎寻常快地停止了植物生长,处理后的杂草保持在施药时的生长阶段,或在过了某一段时间后,先后迅速死亡。因此借助这种方法,通过采用本发明的新的药剂,杂草对有用作物的有害竞争能在很早阶段得到持续的控制。
虽然本发明化合物对单、双子叶杂草具有优良的除草药效,而它们对经济上重要的作物如小麦、大麦、黑麦、水稻、玉米、甜菜、棉花和大豆等只有很小的或根本不具有药害。基于这些理由,本发明化合物很适宜于在有用作物的农田中选择性地控制不需要的植物生长。
此外,本发明化合物对作物还具有调节生长的功能。它们参与作物的新陈代谢过程,并因此使其收获过程较为容易,如通过脱水干枯、落果(叶)和阻滞生长来达到此目的。此外,它们还适宜于对不希望的营养生长进行通常的调节和控制,但并不损伤植物。对许多单、双子叶作物而言,抑制其营养生长具有重要意义,因为借此可减少或完全防止作物的倒伏。
本发明的药剂可以制成通常的制剂形式,如以可湿性粉剂、乳油、浓乳剂、可直接喷洒剂、粉剂、种衣剂、悬浮剂(Dispersionen)、粒剂或微粒剂而被使用。有效成分的含量可在一个较宽范围内变化,其取值一般在2~95%之间,合适的含量有赖于制剂配方
形式。
可湿性粉剂是可均匀分散在水中的制剂,其中除含有效成分之外,还含有湿润剂如聚氧乙烯化的烷基酚、聚氧乙烯化的脂肪醇、烷基磺酸酯或芳基磺酸酯,还含有分散剂如木素磺酸钠、2,2′-二萘甲烷-6,6-二磺酸钠、二丁基萘磺酸钠或油酰甲基牛磺酸钠。另外,如需要,还可加上稀释剂或惰性物质。采用通常的方法(如通过研磨和混合各个成分,可制成可湿性粉剂。
通过将有效成分溶于一种惰性有机溶剂中(如丁醇、环己酮、二甲基甲酰胺、二甲苯,或者高沸点芳烃或高沸点烃类)、并添加一种或多种乳化剂,可制成乳油。对液态有效成分,可取消全部或部分溶剂成分。以下物质可用作(例如)乳化剂:烷芳基磺酸钙盐如十二烷基苯磺酸钙,或者非离子型乳化剂如脂肪酸聚乙二醇酯、烷芳基聚乙二醇醚、脂肪醇聚乙二醇醚、氧化丙烯-氧化乙烯缩合产物,脂肪醇-氧化丙烯-氧化乙烯缩合产物、烷基聚乙二醇醚、脂肪酸脱水山梨醇酯、脂肪酸聚氧乙烯脱水山梨醇酯或聚氧乙烯山梨醇脂肪酸酯。
通过使有效成分与粉碎了的固态物质如滑石、天然黏土如高岭土、膨润土、叶蜡石或硅藻土研磨,可制成粉剂。
或是使有效成分涂于具有吸附性的已成粒的惰性材料上而制成粒剂,或是借助粘结剂如聚乙烯醇、聚丙烯酸钠或矿物油,使有效成分浓溶液涂敷于载体材料如砂、高岭土的表面或已成粒的惰性材料的表面而制成粒剂。需要时,还可采用肥料造粒中常用的方法,使适宜的有效成分与肥料一起成粒。
在可湿性粉剂中,有效成分的含量为约10~90%(重量),其余部分为其它配方成分。在乳油中,有效成分的含量可占至约5~80%(重量)。粉剂中至少含有5~20%(重量)有效成分,可直接喷洒剂含有约2~20%(重量)的有效成分。在粒剂中有效成分的含量部分地取决于有效成分是液态还是固态,还部分取决于采用哪种成粒助剂。填料等。
除此之外,必要时,所说的有效成分制剂中也可含有通常的粘附剂、湿润剂、分散剂、乳化剂、渗透剂、溶剂、填料或载体。
以上所说的各制剂形式在(如)以下参考文献中有叙述:Winnacker-kiichler,“Chemische Technologie”,Band 7,C.Hauser Verlag,Munchen,4.Aufl.1986(“化学工艺学”,第7卷,C.Hauser出版社,慕尼黑,第4版,1986);Van Falkenberg,“Pesticides Formulations”,Marcel Dekker N.Y.,2nd Ed.1972-73;K.Martens,“Spray Drying Handbook”,3rd Ed.1979,G.Goodwin Ltd.London。
为了制成上述制剂所用的配方助剂(惰性材料、乳化剂、湿润剂、表面活性剂、溶剂等)已在(如)以下文献中有过叙述:Marschen,“Solvents Guide”,2nd Ed.,Interscience,N.Y.,1950;Mc Cutcheon′s,“Detergents and Emulsifiers Annual”,Mc Publ.Corp.,Ridgewood,N.J.;Sisley and Wood或者“Encyclopedia of Surface Active Agents”,Chem.Publ.Co.Inc.,N.Y.1964。
市售形式的本发明化合物的制剂可根据使用的需要按通常的方式稀释,如对可湿性粉剂、乳油、悬浮剂以及部分情况下的微粒剂,可用水稀释。粉状的和成粒的制剂以及可直接喷洒剂在使用前通常不再用其它惰性物质稀释。
所需的施用量还随其它条件如温度、湿度等而变化。有效成分的用量可在很宽范围内变化,如0.005~10.0kg/ha或更多,较好的用量是在0.01~5kg/ha之间。
本发明有效成分还可与其它适当的有效成分如杀虫剂、杀螨剂、除草剂、肥料、生长调节剂或杀菌剂混合使用或制成混合制剂。
本发明通过下列实施例更详细解释。
制剂实施例
A.把10份(重量,以下同)有效成分、90份滑石粉或惰性材料相混合,并置于一个锤磨机中粉碎,可得到粉剂。
B.把25份有效成分、64份高岭土作惰性材料、10份作为湿润剂的木素磺酸钾和1份作为分散剂的油酰甲基牛磺酸钠混合起来,并置于一个微粉碎机(Stiftmuhle)中研磨,可制成易于分散在水中的可湿性粉剂。
C.把20份有效成分与6份烷基苯酚聚乙二醇醚(
Triton X207)、3份异十三醇聚乙二醇醚(8 EO)和71份石蜡油(沸点范围如在约255~377℃以上)混合,并置于一个砂磨机中研磨至其粒度低于5微米,可制得易于分散在水中的悬浮剂。
D.把15份(重量)有效成分、75份作为溶剂的环己酮和10份
作为乳化剂的氧乙烯化的壬基酚(10 EO)混合,可制得乳油。
实施例1
N-[(4,6-二甲氧基-嘧啶-2-基)氨基羰基]-N′-(二甲胺基磺酰基)甲胺基磺酰胺
a)异氰酸(N,N,N′-三甲基磺酰二胺基-N′-磺酰)酯28g(0.20mol)异氰酸氯磺酰酯溶于300ml无水氯苯中,在0℃下向它滴加溶于100ml氯苯中的25.6g(0.185mol)N,N,N′-三甲基磺酰二胺(依照Arch.Pharm.314,51(1980)制备)。在0℃下搅拌1小时,再在通氮条件下加热所得到的反应混合物约2小时至回流温度。在冷却至室温后,倾析出未溶物,所得到的反应混合物进行减压蒸馏。在105℃/0.2mbar条件下进行薄膜蒸发之后,得到一个无色油状物,对它不作进一步提纯就可用在下面步骤中。
b)N-[(4,6-二甲氧基-嘧啶-2-基)氨基羰基]-N′-(二甲胺磺酰基)甲胺基磺酰胺
把3.26g(0.021mol)2-氨基-4,6-二甲氧基-嘧啶溶于80ml无水二氯甲烷中,并在0℃下加入溶于20ml二氯甲烷的5.10g(0.021mol)异氰酸(N,N,N′-三甲基磺酰二胺基-N′-磺酰)酯。在0℃下搅拌1小时,在室温下搅拌18小时、再在40℃下搅拌2小时。冷却后,得到的反应混合物先用0.5N盐酸、再用不饱和
的食盐溶液洗涤两次。用正庚烷沉淀后,粗产品用CH2Cl2/正庚烷重结晶,得到6.2g(产率74.2%)其熔点为140~142℃的N-[(4,6-二甲氧基-嘧啶-2-基)氨基羰基]-N′-(二甲胺基磺酰基)甲胺基磺酰胺。
实施例2
N-[(4,6-二甲基嘧啶-2-基)氨基羰基]-N′-(二甲胺基磺酰基)甲胺基磺酰胺
使2.41g(0.017mol)异氰酸氯磺酰酯溶于80ml无水乙腈中,并在-40℃下加入2.1g(0.017mol)2-氨基-4,6-二甲基嘧啶。让反应混合物用约1小时加热到0℃,随后在-40℃下向其中滴加2.35g(0.017mol)N,N,N′-三甲基磺酰二胺。在加完溶于20ml乙腈中的2.4ml(0.017mol)三乙胺后,让所得到的悬浮液用约4小时升温至室温。在20℃下搅拌18小时后,将反应混合物作减压浓缩。浓缩物溶解于二氯甲烷。用0.5N盐酸和不饱和食盐溶液洗涤两次、用Na2SO4干燥,然后再浓缩去掉二氯甲烷液。添加正庚烷后,沉淀出粗产品,然后用二氯甲烷/正庚烷重结晶,得到4.76g(产率76.5%)其熔点为137~139℃的N-[(4,6-二甲基嘧啶-2-基)氨基羰基]-N′-(二甲胺基磺酰基)甲胺基磺酰胺。
采用类似于上面实施例所述的方法,制得了下列表1中的化合物。
表1(续)
实施例 R1R2R3R4E R6R6′ 熔点
序号
154 C6H5- CH3CH3H N CH3OCH3
155 C6H5- CH3CH3CH3N CH3OCH3
156 C6H5CH3CH3H N OCH3OCH3
157 -C6H4-2-Cl CH3CH3H N OCH3OCH3
158 -C6H4-2-COOCH3CH3CH3H CH OCH3OCH3
159 -(CH2)4- CH3H CH CH3CH3
160 -(CH2)4- CH3H CH OCH3OCH377-80℃
161 -(CH2)4- CH3H CH OCH3Cl
162 -(CH2)4- C2H5H CH OCH3OCH3
163 -(CH2)4- n-C3H7H CH OCH3OCH3
164 -(CH2)5- CH3H CH OCH3OCH3
165 -(CH2)5CH3H N OCH3CH3
166 -(CH2)5- CH3CH3N OCH3OCH3
167 吗啉-4-基 CH3H CH CH3CH3
168 ″ CH3H CH OCH3OCH3
169 ″ CH3H CH OCH3CH3
170 硫代吗啉-4-基 CH3H CH OCH3OCH3
表1(续)
生物活性实施例
目测对杂草的药效和对作物的药害,并通过0~5的一组整数分级,其中各数表示:
0=无作用
1=0~20%药效或药害
2=20~40%药效或药害
3=40~60%药效或药害
4=60~80%药效或药害
5=80~100%药效或药害
1.芽前除草效果
把单子叶和双子叶杂草的种子或根茎片段置于装有沙质壤土的塑料花盆中,并覆土。对覆土表面施以不同剂量的本发明化合物(用制成的可湿性粉剂或乳油配成水悬浮液或乳液),其兑水率为600~800 l/ha(经换算)。
经此处理后,把这些花盆置于室温中,并保持适于杂草生长的条件。经3~4周当受试植物发芽后,把它们与未经处理的对照组对比,目测评定杀死杂草或杀死其萌芽的程度。如表3中的评定数据所示,依本发明化合物对广谱的杂草具有良好的芽前除草药效。
2.对杂草的芽后除草药效
把单子叶和双子叶杂草的种子或根茎片段置于装有沙质壤土的
塑料花盆中,并覆土。把这些盆置于室温中并保持适于杂草生长的条件。下种3周后,在受试植物的三叶期进行药剂处理。
把制成可湿性粉剂或乳油的依本发明的化合物以不同剂量喷洒于杂草的绿色部分上,兑水率为600~800 l/ha(经换算)。当受试植物在室温中以最佳生长条件保持3~4周后,与未经处理的对照组比较,目测评定本发明药剂的药效。
表4数据表明,采用芽后处理办法时,本发明药剂对经济上重要的杂草也具有良好的广谱除草药效。
3.作物的耐药性
在进一步的温室试验中,相对大量的作物和杂草的种子被置于沙质壤土上,并覆土。
一些种有这些种子的盆立即进行如1.中所述的处理,其余的盆被置于温室中,直至长出2~3片真叶;然后按2.中所述方法,用本发明有效成分的不同剂量来处理。
处理4~5周后,目测在温室中的受试植物的状况,其结果表明,在作芽前、芽后处理时,本发明有效成分对双子叶作物如大豆、棉花、产籽油菜,甜菜和马铃薯都无药害,即使使用高剂量的有效成分也无药害。此外,如大麦、小麦、黑麦、高粱、玉米或水稻等禾本科作物,也不受一些本发明有效成分的伤害。因此,式Ⅰ化合物对农作物中不需要的植物,具有很高的选择性地控制其生长的功能。
表3
依本发明化合物的芽前除草药效
实施例 有效成分剂量 除草药效
序号 (Kg/ha) SIA CRS STM LOM
1 0.6 5 5 5 5
2 0.6 5 5 5 5
7 0.6 5 4 4 5
20 0.6 5 5 5 5
21 0.6 5 5 5 5
22 0.6 5 5 5 5
23 0.6 5 5 5 5
33 0.6 5 5 5 5
45 0.6 5 5 5 5
48 0.6 5 5 5 5
66 0.6 5 5 5 5
111 0.6 5 5 5 5
130 0.6 4 4 4 4
153 0.6 4 4 4 4
160 0.6 5 5 5 5
表4
芽后除草药效
实施例 有效成分剂量 除草药效
序号 (Kg/ha) SIA CRS STM LOM
1 0.6 5 5 5 5
2 0.6 5 5 5 5
7 0.6 5 5 4 4
20 0.6 5 5 5 5
21 0.6 5 5 5 5
22 0.6 5 5 5 5
23 0.6 5 5 5 5
33 0.6 5 5 5 5
45 0.6 5 5 5 5
48 0.6 5 5 5 5
66 0.6 5 5 5 5
111 0.6 5 5 5 5
130 0.6 4 4 4 4
153 0.6 5 5 5 5
160 0.6 5 5 5 5
缩写:SIA=白芥
CRS=珍珠菊
STM=繁缕
LOM=多花黑麦草
抑制禾谷类作物的生长
在温室中的盆栽试验中,对处于3叶期的禾谷类作物(小麦、大麦、黑麦)的幼苗上,喷以不同浓度的本发明有效成分(kg/ha)药液,直至雾滴润湿叶面。
当未作处理的对照组植物长至约55cm高后,测量所有植物的增高(从喷药时植物高度算起),抑制生长作用以对照组植物的增高的部分数表示。此外,记录有效成分的药害,100%表示生长已停止,0%表示未作处理的对照组植物的生长状况。显然,本发明的有效成分具有很好的调节植物生长的性质。其结果列于下表中。
表5
化合物的实 施用剂量 生长抑制作用 药害
施例序号 (kg/ha) 小麦 大麦 黑麦
1 0.62 25 24 43 无药害
0.31 18 17 29
2 0.62 19 22 35 无药害
0.31 15 17 29
Claims (7)
1、一种制备式化合物的方法
其中
R1和R2相互独立地代表H、C1-4烷基或苯基,或R1和R2与它们所结合的N原子共同形成一个下式杂环
下标α相互独立地为1至3的一个整数,
R3代表H、C1-6烷基、C2-4链烯基或C2-4炔基,或
R2或R3共同代表一个C2-4亚烷基链,且R4代表H、C1-4烷基或烯丙基,
R6和R6′相互独立地代表卤素、C1-4烷基或C1-4烷氧基,这两种基团可以是卤代的,
E代表N或CH,
其特征在于,当式(Ⅰ)中R1、R2或R3不为氢时,使式(Ⅱ)化合物与式(Ⅲ)化合物反应
其中R1、R2和R3除不代表H外,具有与式(Ⅰ)中相同的含义,
其中E、R4、R6和R6′有与式(Ⅰ)相同的含义;当式(Ⅰ)中R1、R2和R3为氢时,将上述由(Ⅱ)和(Ⅲ)反应得到的产物用通常方法转化成最终的式(Ⅰ)化合物;当终产物为一种盐时,用通常方法将式(Ⅰ)化合物转化为它的盐。
2、按照权利要求1的方法,其中,基团R6和R6′相互独立地为CH3、OCH3、C2H5、OC2H5或Cl。
3、按照权利要求1的方法,其中,基团R6和R6′相互独立地为CH3、OCH3或Cl。
4、按照权利要求1的方法,其中,反应在一种惰性非质子性溶剂中进行。
5、按照权利要求4的方法,其中,溶剂选自乙腈、二氯甲烷、甲苯、四氢呋喃和二噁烷。
6、按照权利要求4的方法,其中,反应温度在0℃至溶剂的沸点之间。
7、按照权利要求5的方法,其中,反应温度在0℃至溶剂的沸点之间。
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US4946494A (en) * | 1987-10-30 | 1990-08-07 | E. I. Du Pont De Nemours And Company | Herbicidal pyridine sulfonylureas |
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EP0409114B1 (de) * | 1989-07-19 | 1994-11-09 | Hoechst Schering AgrEvo GmbH | Heterocyclisch substituierte Sulfonylharnstoffe, Verfahren zu ihrer Herstellung und ihre Verwendung als Herbizide oder Pflanzenwachstumsregulatoren |
DE4008403A1 (de) * | 1990-03-16 | 1991-09-19 | Merck Patent Gmbh | Glykolsaeurederivate |
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US5022916A (en) | 1991-06-11 |
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BR8902917A (pt) | 1990-02-06 |
EP0347788A2 (de) | 1989-12-27 |
HUT51107A (en) | 1990-04-28 |
IL90638A0 (en) | 1990-01-18 |
CA1340283C (en) | 1998-12-22 |
DE58908168D1 (de) | 1994-09-15 |
JPH0245473A (ja) | 1990-02-15 |
KR910000662A (ko) | 1991-01-30 |
ATE109774T1 (de) | 1994-08-15 |
AU3653489A (en) | 1989-12-21 |
EP0347788B1 (de) | 1994-08-10 |
ES2060697T3 (es) | 1994-12-01 |
CN1039417A (zh) | 1990-02-07 |
HU206592B (en) | 1992-12-28 |
EP0347788A3 (en) | 1990-09-26 |
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