... 3). In some instances, the identities of the nitration products were also established by independent, direct syntheses. Chlorinations yielded 3,5-dichloro compounds. ... 424 CAN. J. CHEM. VOL. 66, 1988 ... Compound no. R 1 R3 R4 R5 R6 H(R)-3 H(R)-4 H(R)-5 H(R)-6 Solvent ...