Synthesis and collateral dilator activity of nitroxyalkylamides having direct or latent sulfhydryl moieties

To develop an orally active, long-acting nitrate that does not induce tolerance, nitroxyalkyl compounds were prepared and their activities evaluated by the use of carotid collaterals in anesthetized dogs. A compound having a favorable pharmacological profile, that is, long-lasting collateral vasodilatation and little hypotension, and lack of nitrate tolerance, was chosen for further evaluation.