title: Enantioselective approach to 13a-methylphenanthroindolizidine alkaloids.
abstract: The first enantioselective approach to 13a-methylphenanthroindolizidine alkaloids is reported, featuring an efficient stereoselective Seebach's alkylation and Pictet-Spengler cyclization. The proposed and other three most probable structures were ruled out, indicating hypoestestatin 1 needs further assignment.
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Su
authors.forename: Chunlong
authors.initials: C
authors.lastname: Cai
authors.forename: Qingmin
authors.initials: Q
authors.lastname: Wang
mesh_terms: D000470:Alkaloids / Q000737:chemistry*; D000478:Alkylation; D002384:Catalysis; D003500:Cyclization; D007212:Indolizines / Q000737:chemistry*; D015394:Molecular Structure; D010618:Phenanthrolines / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D000470:Alkaloids; D007212:Indolizines; D010618:Phenanthrolines; C521640:phenanthroindolizidine