| 摘要 |
NEW MATERIAL:A compound expressed by formula I (X and Y are 0 or S; Z is H, halogen, alkyl or nitro; n is 2 or 3). EXAMPLE:4,5-Dimethylene-2,4-benzoxazin-3-one expressed by formula II. USE:An agricultural and horticultural germicide. PREPARATION:A compound expressed by formula III (Z<1> is H, halogen or alkyl), e.g. 7-hydroxymethyl-2,3-dihydroindole, etc., is reacted with a trichloromethyl chloroformate to afford the aimed compound expressed by formula I (X and Y are O; Z is H, halogen or alkyl), e.g. 4,5-dimethylene-2,4- benzoxazin-3-one, etc. The starting raw material expressed by formula III is partially a novel substance, e.g. 7-hydroxymethyl-2,3-dihydroindole, 8- hydroxymethyl-1H,2,3,4-tetrahydroquinoline, etc. |
