Nucleophilic Substitution Reactions of Thienyl Neopentyl Substrates

Abstract

The reaction of the chlorides (4)-(6), which are both neopentylic and thenylic , were studied. The chloride (4), unlike its analogue (13) in the benzene series, undergoes ready solvolysis with alcohols to give the corresponding ethers, e.g. (7)-(9). The chlorides (5) and (6) react more slowly than (4) but undergo methanolysis to give the methyl ethers (11) and (12) respectively. In the dipolar aprotic solvents, dimethyl sulfoxide and dimethylformamide, the reactions of the chlorides (4), (5) and (6) with the thiolate salt (16) appear to proceed by an S_N1-like, an S_N(AEAE) and an S_RNl process respectively.