[EN] PREPARATION OF PHANTASMIDINE AND ANALOGUES THEREOF<br/>[FR] PRÉPARATION DE PHANTASMIDINE ET DE SES ANALOGUES
申请人:UNIV BRANDEIS
公开号:WO2012078608A1
公开(公告)日:2012-06-14
Described are methods of synthesizing phantasmidine and analogues thereof from commercially available starting materials. The compounds are useful as pharmacological probes and potential lead compounds for the development of selective nicotinic receptor therapeutics.
Reaction of 6-chloro-2-fluoro-3-pyridineacetamide with 1,2-bis(trimethylsilyloxy)cyclobutene in ether saturated with hydrogen chloride afforded the keto amide in 85% yield. In the key step, treatment of the keto amide with aqueous KOH in t-BuOH resulted In a tandem intramolecular aldol reaction-intramolecular nucleophilic aromatic substitution sequence to give the tetracylic lactam In 46% yield. Reduction of the lactam with BH3 In THF gave phantasmidine in 67% yield.