Use of hydroxylamine derivatives, and method and preparations for increasing the tolerance of field crops against weather stresses
申请人:——
公开号:US20010051630A1
公开(公告)日:2001-12-13
This invention relates to the use of hydroxylamine derivatives of general formula (I), wherein R
1
represents phenyl, N-heteroaryl, S-heteroaryl or a naphthyl group any of which may be unsubstituted or substituted, an unsubstituted or substituted phenylamino or alkylamino or lower alkoxy; X represents halo, amino or an unsubstituted or substituted phenylamino group, or amino substituted with one or two lower alkyl or a hydroxy group, provided that if R
1
represents unsubstituted or substituted phenylamino, alkylamino or lower alkoxy, then X is not halo; Y represents hydrogen, hydroxy or alkanoyloxy, with the proviso that simultaneously R
1
may not represent phenyl, halophenyl, alkoxyphenyl, N-heteroaryl or naphthyl, X may not represent halo, hydroxy or amino and Y may not represent hydrogen or hydroxy; R
2
and R
3
, independently from each other, represent hydrogen or lower alkyl group, provided that R
2
and R
3
are not hydrogen simultaneously, or R
2
and R
3
along with the adjacent nitrogen atom form a 5- to 7-membered saturated hetero ring, to increase the tolerance of cultivated plants against weather condition stresses, such as cold, frost and drought.
本发明涉及使用羟胺衍生物的一般式(I),其中R1代表苯基、N-杂环基、S-杂环基或萘基,其中任何一个可能未取代或取代,未取代或取代的苯氨基或烷基氨基或较低的烷氧基;X代表卤素、氨基或未取代或取代的苯氨基基团,或取代一或两个较低的烷基或羟基的氨基,但如果R1代表未取代或取代的苯氨基、烷基氨基或较低烷氧基,则X不是卤素;Y代表氢、羟基或脂肪酰氧基,但同时R1不能表示苯基、卤苯基、烷氧基苯基、N-杂环基或萘基,X不能表示卤素、羟基或氨基,Y不能表示氢或羟基;R2和R3相互独立地代表氢或较低的烷基,但要求R2和R3不能同时为氢,或者R2和R3与相邻的氮原子一起形成5-至7-成员的饱和杂环,以提高栽培植物对天气条件胁迫,如寒冷、霜冻和干旱的耐受性。