Transformation of Aldehydes into (E)-1-Alkenylboronic Esters with a Geminal Dichromium Reagent Derived from a Dichloromethylboronic Ester and CrCl2 - Takai, Kazuhiko; Shinomiya, Norio; Kaihara, Hiroya; Yoshida, Naomi; Moriwake, Toshio; Utimoto, Kiitiro (Synlett, 1995)