| abstract |
Compounds of formula (I), wherein one X is COOR, CH2?COOR, CH(COOR)2?, CONHR, CH2?CONHR, or CN; remaining X's are H, F, CH3?, OH, COOR, CH2?COOR, CH(COOR)2?, CONHR, CH2?CONHR, or CN; Y is (i1), (i2), (i3), (i4), or (i5); R is H, alkyl of 1-5 carbon atoms, or benzyl; R1? is CH2?OR3?, COOR, or CONHR; R2? is H, OR3?, or Br; R3? is H, COR4?, or tetrahydropyranyl; R4? is alkyl of 1-5 carbon atoms, or benzyl; R5? is H, or COR4?; --- represents a single or double bond; $(1,3)$represents $g(a)-position, $g(b)-position, or a mixture of $g(a)- and $g(b)-positions; and --- represents $g(a)-position; and methods for preparing the same. |