Abstract: The present invention provides 2-substituted quinuclidines of the formula ##STR1## and the pharmaceutically acceptable acid addition salts thereof wherein R is phenyl, halogen-substituted phenyl, lower alkyl-substituted phenyl, pyridyl or 5-methyl-1,3,4-oxadiazol-2-yl.These quinuclidine compounds are useful as anti-diarrheal agents.

Abstract: The present invention provides Diaryl-(1-azabicyclo [2.2.2]octan-2-yl)alkanols of the formula ##STR1## and the pharmaceutically acceptable acid addition salts thereof wherein R is a cycloalkanol having 4-8 carbon atoms, an alkanol having 1-2 carbon atoms, or a radical of the formula ##STR2## wherein R.sub.1 and R.sub.2 are each H or a C.sub.1 -C.sub.5 alkyl, and R.sub.3 is H or an acyl of the formula ##STR3## wherein R.sub.4 is H or a C.sub.1 -C.sub.4 alkyl. These alkanols are useful as antidiarrheal agents.

Abstract: This invention encompasses novel 2-(2,2-diphenyl-4-pentenyl-1-azabicyclo[2.2.2]octane and related compounds. These compounds are useful anti-diarrheal agents which possess little if any analgesic activity.

Abstract: The present invention encompasses compounds of the formula ##STR1## and pharmaceutically acceptable acid addition salts thereof wherein the Alk is straight or branched chain alkylene containing 2-4 carbon atoms; M is alkylene having 1-4 carbon atoms; Ar and Ar' are phenyl, alkyl substituted phenyl wherein the alkyl contains from 1-4 carbon atoms or halo substituted phenyl; Ar" is phenyl, alkyl substituted phenyl wherein the alkyl contains 1-4 carbon atoms, halo substituted phenyl or pyridyl; X is hydrogen, halogen, trifluoromethyl or alkyl having from 1-4 carbon atoms; R is hydrogen alkyl having from 1-7 carbon atoms or an alkanoyl having from 2-5 carbon atoms. These compounds are potent antidiarrheal agents characterized by little, if any, central nervous system activity.

Abstract: This invention encompasses novel 5-[1,1-diphenyl-3-(4-phenylpiperidino)propyl]-2-methyl-1,3,4-oxadiazoles and structurally related compounds. These compounds are useful anti-diarrheal agents which , in addition to their anti-diarrheal utility, possess a utility as potent analgesic agents.

Abstract: This invention encompasses novel 2,2-diaryl-3-(1-azabicyclo[2.2.2]oct-2-yl)propionamides and intermediates thereto. These compounds are useful anti-diarrheal agents which possess little or no analgesic activity.

Abstract: This invention encompasses novel 5-[1,1-diphenyl-3-(5-or 6-hydroxy-2-azabicyclo[2.2.2]oct-2-yl)propyl]-2-alkyl-1,3,4-oxadiazoles and their lower O-alkanoyl derivatives. These compounds are useful anti-diarrheal agents and also possess little or no analgesic activity.

Abstract: This invention encompasses novel 2-[5-(cyclic amino)ethyl-10,11-dihydro-5H-dibenzo[a,d] cyclohepten-5-yl]-5-alkyl-1,3,4-oxadiazoles and congeners, useful as anti-diarrheal agents.

Abstract: This invention encompasses novel 2,2-diphenyl-5-(4-substituted-piperidino)-3-trans-pentenenitriles. These compounds are useful anti-diarrheal agents and also possess analgesic activity.

Abstract: This invention encompasses novel 5-[1,1-diphenyl-4-(cyclic amino)but-2-trans-en-1-yl]-2-alkyl-1,3,4-oxadiazoles and intermediates thereto. These compounds are useful anti-diarrheal agents.