Reference

Preparation of arylpropionic acids as herbicides

Preparation of arylpropionic acids as herbicides. Oyama, Hiroshi; Masumizu, Tatsuya; Morita, Takeshi; Yoshizawa, Hirokazu (Hokko Chemical Industry Co., Ltd. There are some commonly used reagents like 13223-25-1 in this article., Japan). Jpn. Kokai Tokkyo Koho JP 04029980 A2 31 Jan 1992 Heisei, 11 pp. (Japan). CODEN: JKXXAF. CLASS: ICM: C07D239-60. ICS: A01N043-54; A01N043-66; C07D251-30; C07D401-12. APPLICATION: JP 90-134107 25 May 1990. DOCUMENT TYPE: Patent CA Section: 5 (Agrochemical Bioregulators) Section cross-reference(s): 28 Herbicides contain the title compds. I [R1= OH, lower alkoxy, NR2R3; R2, R3 = H, lower alkyl, Ph, lower phenylalkyl; A, B = CH, N; X = H, halo, lower alkyl, NO2] as active ingredients. Treatment of 19.5 g Et 3-(3-hydroxy-2-pyridyl)propionate with K2CO3 and 17.5 g 2-chloro-4,6-dimethoxypyrimidine in DMSO at 110° for 1 h gave 33 g I (R1 = OEt, A = N, B = CH, X = H) (II), which at 50 g/10 are showed 100% control of Panicum crus-galli, Scirpus juncoides, Monochoria vaginalis, and other weeds with no damage to rice, vs. less effect and some damage to rice, for 4-ClC6H4CH2CHClCO2H. II 20, Sorpol 700H 20, and xylene 60 parts were mixed to give an emulsion. .