| abstract |
The present invention provides compounds useful in the synthesis of biologically active compounds, and processes for their production, the compounds having the formula: wherein: R1 and R2 are, independently, selected from H; C1-C12 alkyl or C1-C6 perfluorinated alkyl; X represents a leaving group; A is O or S; m is an integer from 1 to 3, preferably 2; R3, R4, R5, and R6 are independently selected from H, halogen, -NO2, alkyl, alkoxy, C1-C6 perfluorinated alkyl, OH or the C1-C4 esters or alkyl ethers thereof, -CN, -O-R1, -O-Ar, -S-R1, -S-Ar, -SO-R1, -SO-Ar, -SO2-R1, -SO2-Ar, -CO-R1, -CO-Ar, -CO2-R1, or -CO2-Ar; and Y is selected from a) the moiety: wherein R7 and R8 are independently selected from the group of H, C1-C6 alkyl, or phenyl; or b) an optionally substituted five-, six- or seven-membered saturated, unsaturated or partially unsaturated heterocycle or bicyclic heterocycle containing up to two heteroatoms selected from the group consisting of -O-, -NH-, -N(C1C4 alkyl)-, -N=, and -S(O)n-. |