Compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 and each independently --H or lower alkoxy; R.sub.3 and R.sub.4 are each independently lower alkyl; and R.sub.5 and R.sub.6 are each --OCH.sub.3, or together form --OCH.sub.2 O-- or --OCH.sub.2 CH.sub.2 O--, and pharmaceutically acceptable acid addition salts thereof are prepared by cyclizing, deoxygenating, coupling, or hydrogenating the intermediates disclosed herein.
successfully developed. Further transformation with alkylamine/sodium alkoxide alcohol solution conveniently afforded novel polysubstituted pyrroles in good to excellent yields. This methodology for highlyfunctionalized pyrroles performed well over a broad scope of substrates. It is conceivable that this efficient construction method for privileged pyrrole scaffolds could deliver more active compounds for medicinal