REACTION OF 1-(DIPHENYLMETHYLENE)-2(1H)-AND 4-(DIPHENYLMETHYLENE)-1(4H)-NAPHTHALENONES WITH THIOL PHOSPHORIC ACIDS, LAWESSON REAGENT AND PHOSPHORUS PENTASULPHIDE

Abstract

Naphthalenone 1 reacts with thiol phosphoric acids 3 and 6 to give adducts 5 and 7, respectively. Reaction of 1 with Lawesson reagent 8 and P₄S₁₀ gives adducts 9 and 10, respectively. On the other hand, reaction of naphthalenone 2 with reagent 3 and 6 leads to the formation of adducts 11 and 12, respectively. Thiation of 2 with 8 or P₄S₁₀ yields the dimeric adduct 14. The identity of the new products is established from analytical and spectroscopic evidences.

Key Words:

• o,pi-Naphthalenones
• thiol phosphoric acids
• Lawesson reagent
• P₄S₁₀
• oxathiaphosphorine derivatives
• 1,1-di[-4-(diphenylmethylene)-1,4-dihydronaphthyl]-dithietanes