Stereoselective Olefination Promoted by Rieke Manganese

Significance

A Rieke manganese promoted stereoselective synthesis of (Z)-α-haloacrylic esters and amides is presented. The reaction shows good yields and excellent cis-to-trans selectivity ratios. Two limitations are that ketones cannot be used and only trichloroacetates have a broad scope for both reactions. Several post-modifications of the products are reported.