Titanocene(II)-Promoted Stereoselective Alkenylation Utilizing (Z)-Alkenyl Sulfones.

Abstract

Page 3821. In Scheme 7, the structure 7B was incorrect. The corrected scheme is shown below.

Regio- and stereoselective preparation of dienylcarboxylic acids and dienylphosphonic esters using a (Z)-alkenyl sulfone–titanocene(II) system

“…2 Protonation of the dienyltitanium species 10 affords the functionalized dienes 3 and 4 (Scheme 3). The formation of the (2Z,4E)-isomers in the reaction of acetylenic esters 6 would be attributable to the protonation via titanium allenolates 11 produced by the C to O-titanium migration of 10.…”