A One-Pot Procedure for Thieno[2,3-b]thiophene and Some of its Derivatives Using Derivatives of 1,3-Pentadiyne and Carbon Disulfide as Building Units

Abstract

Thieno[2,3-b]thiophene and its 2-methyl- and 2-N,N-dialkylamino derivatives have been obtained in fair yields in a one-pot procedure using the diynes CH₃C≡CC≡CR (R=Me₃Si, CH₃, NMe₂, NEt₂) and carbon disulfide as building blocks and n-butyllithium, potassium tert-butoxide and t-butylacohol as reagents.