Synthesis of a Secondary N-Desmethyl and a Tertiary N-Cyclopropylmethyl Bridged Hexahydroaporphine as Precursors to Bicyclic Opioid Ligands
作者:Ngoc D. Tran、Kathleen M. Brosnahan、Victoria F. Roche
DOI:10.1002/jps.2600791119
日期:1990.11
N-cyano intermediate resulted in product decomposition. A successful approach to 3 involved the hydrolysis of the N-formyl precursor 1 in ethanolic potassium hydroxide. Direct alkylation of the secondary amine 3 utilizing cyclopropylmethyl bromide and sodium bicarbonate successfully generated the alkylated derivative 4. Both products were purified in hydrochloride salt form and characterized by standard