... (C) 1986 The Chemical Society of Japan Reduction of Ketene Dithioacetal S,S-Dioxides with Sodium Borohydride and Its Application to a Convenient Synthesis of Alkyl Arylmethyl Ketones Katsuyuki OGURA,* Kazuo OHTSUKI, Kazumasa TAKAHASHI, and Hirotada IIDA Department of Synthetic Chemistry, Faculty of Engineering, Chiba University, Yayoicho 1-33, Chiba 260 The CC double bond of a ketene dithioacetal S,S-dioxide was ...