Asymmetric formal synthesis of (+)-cycloclavine

被引:12
|
作者
Chen, Jin-Quan [1 ]
Song, Le-Le [1 ]
Li, Feng-Xing [1 ]
Shi, Zi-Fa [1 ]
Cao, Xiao-Ping [1 ]
机构
[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China
基金
中国国家自然科学基金;
关键词
ENANTIOSELECTIVE TOTAL-SYNTHESIS; VINYLOGOUS MANNICH REACTIONS; TERT-BUTANESULFINYL IMINES; ERGOT ALKALOIDS; SELECTIVE SYNTHESIS; CLAVINE ALKALOIDS; ALLENYL ALCOHOLS; (+/-)-CYCLOCLAVINE; LACTONES; AMINES;
D O I
10.1039/c7cc08044a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The asymmetric synthesis of Szantay's amine (+)-2, the pivotal precursor for direct access to (+)-cycloclavine (1), is described for the first time in eleven steps with 19.7% overall yield from the commercially available 4-bromoindole. The strategy features an asymmetric induction by Ellman's sulfinimine and rhodium-catalysed isomerization of the C=C bond.
引用
收藏
页码:12902 / 12905
页数:4
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