A practical asymmetric synthesis of a wide-spectrum agricultural fungicide, (S)-MA20565 (1), is described. The convergent synthesis was achieved starting from commercially available 3-(trifluoromethyl)aniline (7) in 44% overall yield through five steps and 2-bromobenzaldehyde (9) in 48% overall yield through four steps, respectively. (S)-O-[1-(3-Trifluoromethylphenyl)ethyl]hydroxylamine (2), a key
OPTICALLY ACTIVE METHOXYIMINOACETAMIDE DERIVATIVES, PROCESS FOR THE PREPARATION OF THEM, INTERMEDIATES THEREFOR, AND PESTICIDES CONTAINING THEM AS THE ACTIVE INGREDIENT
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP0949243A1
公开(公告)日:1999-10-13
An optically active methoxyiminoacetamide derivative represented by the following general formula (I)
(in the above general formula, Ar represents an aryl group or a heteroaryl group, Y represents a hydrogen atom, a halogen atom, a C1-C4 alkyl group, a C1-C4 haloalkyl group, a C1-C4 alkoxy group, a C1-C4 haloalkoxy group, a C1-C4 alkylthio group, a C2-C6 alkynyloxy group, a cyano group, a nitro group or an aryl group and n is an integer of 1 to 3), wherein its angle of rotation shows a negative value in chloroform has markedly excellent activities as agricultural chemicals.