| abstract |
New spiro-(indolino-2,3'(3H) -naphth(2,1-6)(1,4)oxazine cpds. of formula (I) R1, R2 and R3 = H, -CN, -SCN, -NO2, -X, -CH2X, -CX3, -OR, -SR, -COR, -COOR or =Ar; X = halogen; =Ar= annelated (hetero)aromatic ring system; R4, R5, R6 and R7 = H, -R, -CH2R, -NH2, -NHR, -N(R)2, -OR or -SR but at least one of R4, R5 and R6 not = Me if R7 = H; R = H, 1-8C alkyl or (hetero)aryl. R7 = -CH3, -C2H5, -C6H11, -NC5H10 or -N(C6H11)2. |