chloroacetone derivatives gave related products of mercapto group substitution. The latter compounds could be cyclized in Thorpe-Ziegler reaction to related 3-amino-4-(pyrrolidin-1-yl)thieno[2,3-b]pyridine derivatives. Reaction of 2 with sodium hydroxylamino-O-sulphonate gave the related aminosulfanyl derivative. Selected product were screened for bacteriostatic and antituberculosis activity, and some of them