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Attempted synthesis of pyrrolidinyl and piperidinyl-3-thio derivatives. Reaction conditions: (i) 21: C4H8Br2, K2CO3, MeCN, reflux, 24 h, 88%; 22 C5H10Br2, K2CO3, MeCN, reflux, 40 h, 70%; (ii) MsCl, DCM, r.t., 4 h, 23 52%, 24 60%; and (iii) KSAc, DMF or MeCN or DMPU, reflux, 0%.
