Compounds of formula (I) or a pharmaceutically acceptable ester, amide, carbamate or salt thereof, including a salt of such an ester, amide or carbamate in which R
1
to R
9
have meanings as defined in the Specification, are useful as estrogen receptor ligands.
A novel palladium‐catalyzed three‐component reaction of phenol‐derived biaryls with N‐benzoyloxyamines and norbornadiene (NBD) has been developed for the assembly of highly functionalized spiroindenes. This domino process was realized through NBD‐assisted C−H amination and phenol dearomatization by forming one C−N bond and two C−C bonds in a single step. Preliminary studies indicated that asymmetric