FROM SILYLPHOSPHANES AND 2-BENZAL-1-INDANONES TO NEW PHOSPHANES, PHOSPHANE OXIDES OR SULFIDES AND PHOSPHONIUM SALTS

Abstract

Diethyl(trimethylsilyl)phosphane 1 reacts with the conjugated carbonyl moiety of 2-benzal-1-indanones 2–6 to afford exclusively 1,4-adducts 2a–6a. Subsequent oxydation or sulfuration of most of the adducts leads to the corresponding phosphane oxides or sulfides. Further hydrolysis or reaction with HCl involves the desilylation with the formation of new (thio)phosphorylated ketones or phosphonium salts.

Key Words:

• Silylphosphanes
• 2-benzal-1-indanones
• phosphane oxides
• phosphane sulfides
• phosphonium salts
• 1,4-additions