Abstract
AbstractStraightforwardly stereo‐defined syntheses of (E)‐ and (Z)‐Tamoxifens were described, including a description of chemo‐selective activation of (E)‐1‐bromo‐2‐iodoalkenes. The (E)‐1‐bromo‐2‐iodoalkenes were employed as starting materials; first, the vinylic iodine was transformed into a phenyl group with employing CuTC and PhSnBu3 reagents. Then the resultant vinylic bromine undertook Suzuki reaction to afford an all‐carbon tetrasubstituted olefin; finally, the phenol‐protective group was converted into the corresponding amino‐moiety. The stereochemistry of the initial (E)‐1‐bromo‐2‐iodoalkenes was fully retained throughout. Thus, it would provide us a new entry for preparation of Tamoxifens and its related compounds.
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