Novel pyrrolecarboxylic acid derivatives represented by the following formula: ##STR1## where R.sup.1 is a hydrogen atom, an alkyl group of 5 to 25 carbon atoms or an alkenyl group of 5 to 25 carbon atoms, R.sup.2 is a hydrogen atom, a phenyl group or an optionally substituted alkyl group of 1 to 10 carbon atoms, and R.sup.3 is a hydrogen atom, an alkyl group of 5 to 25 carbon atoms or an alkenyl group of 5 to 25 carbon atoms, or pharmaceutically acceptable salts thereof are provided. The compounds are highly effective in reducing the level of triglyceride or cholesterol in serum, and useful as an active ingredient of a pharmaceutical composition for treating hyperlipemia and arteriosclerosis.
Synthesis of <i>N</i>-alkoxycarbonyl Pyrroles from <i>O</i>-Substituted Carbamates: A Synthetically Enabling Pyrrole Protection Strategy
作者:Jodie L. Hann、Catherine L. Lyall、Gabriele Kociok-Köhn、Simon E. Lewis
DOI:10.1021/acs.joc.3c01257
日期:2023.10.6
5-dimethoxytetrahydrofuran gives N-alkoxycarbonyl pyrroles in a single step and in good yield. By this method, several common amine protecting groups can be introduced on the pyrrole nitrogen. With the exception of N-Boc, N-alkoxycarbonyl groups have seen only minimal use for protection of the pyrrole nitrogen to date. Here, we show that N-alkoxycarbonyl protection can endow pyrrole with distinct reactivity in comparison