Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Paunenge uchipisa amine yekutanga neN-2,4-dinitrophenyl-pyridinium munyu (2), kuwedzerwa kweamine kunotungamira mukuvhurwa kwepyridinium mhete. Kuwedzerwa kwechipiri kweamine kunotungamirira kukudzingwa kwe2,4-dinitroaniline (5) uye kuumbwa kwemunyu weKönig (6a uye 6b). Iyo trans-cis-trans isomer yemunyu weKönig (6a) inogona kuita nekugadzirisazve sigmatropic kana nucleophilic kuwedzera kwezwitterionic yepakati kuti ipe cyclized yepakati (7). Ikoku kwakarumbidzwa kuva danho rinosarudza mwero. Mushure mokunge maproton aendeswa uye amine yabviswa, pyridinium ion (9) inodiwa inoumbwa.  Mubvunzo: Chii chinoitika kana ukawedzera amine yokutanga?
kuvhurwa kwerin'i yepyridinium