期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.202301062
关键词
alkaloids; asymmetric synthesis; decahydroquinolines; lactams; total synthesis
In this study, the first enantioselective total synthesis of Myrioneuron alkaloid schoberine B and its enantiomer schoberine B was achieved.
A dynamic kinetic asymmetric transformation, involving the generation of four stereogenic centers with a well-defined configuration, occurs in the cyclocondensation of diastereomeric mixtures of 2-oxocyclohexanepropionic acid racemates 6 with (1S,2R)-cis-aminoindanol: two major tetracyclic lactams, 7 a and 7 b, that differ in the configuration of the four stereocenters on the decahydroquinoline moiety were obtained. From the above lactams, the removal of the chiral auxiliary, the introduction of a 2-piperidone ring, and the closure of the diazine ring complete the first enantioselective total synthesis of the Myrioneuron alkaloid (-)-schoberine B and its enantiomer (+)-schoberine B.
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