Detail of "5634-53-7"

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Pyrimidine derivatives, process for their preparation, and their use as herbicides

. Hur, Chang Uk; Cho, Jin Ho; Hong, Su Myeong; Kim, Hong Woo; Lim, Young Hee; Rim, Jae Suk; Kim, Jeong Su; Chae, Sang Heon (Lucky Ltd., S. Korea). Eur. Pat. Appl. EP 658549 A1 21 Jun 1995, 54 pp. DESIGNATED STATES: R: CH, DE, FR, GB, LI, NL. (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: C07D239-60. ICS: C07D401-12; A01N043-54. APPLICATION: EP 94-117857 11 Nov 1994. PRIORITY: KR 93-24099 13 Nov 1993; KR 93-30055 27 Dec 1993; KR 93-31016 29 Dec 1993. DOCUMENT TYPE: Patent CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Section cross-reference(s): 5 The invention relates to novel herbicidal pyrimidine derivs. I [R1 = 4,6-dimethoxy-2-pyrimidinyl, C1-4 alkyl, C2-4 alkenyl, acyl, alkylsulfonyl or heteroarylmethyl; R2 = H, halo, cyano, NO2, C1-8 alkyl, C1-8 alkoxy, C1-8 alkythio, C1-8 alkoxycarbonyl, C2-4 alkenyloxycarbonyl, (hetero)arylmethoxycarbonyl, C1-4 alkylaminocarbonyl, aryl-C1-4 alkylaminocarbonyl, heteroarylmethylaminocarbonyl, aryl, C2-8 alkenyl, C3-6 cycloalkyl, PhCH2, aryloxy, arylthio, or C1-8 alkylcarbonyl; R3 = (un)substituted Ph, COR4; R4 = H, C1-4 alkyl, C2-4 alkenyl, C3-6 cycloalkyl, PhCH2, aryl, C1-4 alkoxy, C2-4 alkenyloxy, C3-6 cycloalkoxy, PhCH2O, aryloxy, C1-4 alkythio, C2-4 alkenylthio, C3-6 cycloalkylthio, PhCH2S, arythio, amino which can be substituted with C1-C4 alkyl or aryl or arylmethyl], as well as a process for their prepn., and their herbicidal compns.In this study，5634-53-7 is also used. I have excellent activity against both narrow- and broadleaf weeds, with increased safety for crops (esp. directly sown rice). For example, 2,6-bis(4,6-dimethoxypyrimidin-2-yl)oxybenzoic acid was treated with 2,2'-dipyridyl disulfide and PPh3 in PhMe to give 90% of the corresponding 2-pyridyl thioester, which reacted with benzaldehyde oxime in CH2Cl2 in the presence of CuBr2 to give 85% title compd. II. At 63 g/ha postemergence under paddy field conditions, II gave complete control of 7 weeds with no damage to direct-sown rice seedlings. Characterizing phys. and herbicidal data for 73 compds. are given. .