Absolute configurations of the cis- and trans-13-methyltetrahydroprotoberberines. Total synthesis of (+)-thalictricavine, (+)-canadine, (.+-.)-, (-)-, and (+)-thalictrifoline, and (.+-.)-, (-)-, and (+)-cavidine
Absolute configurations of the cis- and trans-13-methyltetrahydroprotoberberines. Total synthesis of (+)-thalictricavine, (+)-canadine, (.+-.)-, (-)-, and (+)-thalictrifoline, and (.+-.)-, (-)-, and (+)-cavidine