C32-O-Ether derivatives of L-683,590 have been prepared by alkylation
with various alkyl, alkenyl, and alkynyl 2,2,2-trichloroacetimidates.
These analogs exhibit good immunosuppressive activity in vitro, as mea
sured in a T cell proliferation assay. In the case of cinnamyl ethers,
this activity correlates with the lipophilicity (pi value) of the aro
matic substituents.