alkaloids;
Michael addition;
natural products;
nitrogen heterocycles;
total synthesis;
FUSED TRICYCLIC AMINES;
MYRIONEURON-NUTANS;
BIOMIMETIC SYNTHESIS;
DIPOLAR CYCLOADDITION;
NITRARIA ALKALOIDS;
ACYCLIC ALDEHYDES;
MICHAEL REACTION;
(+)-ISONITRAMINE;
MYRIOXAZINE;
CYCLIZATION;
D O I:
10.1002/anie.201407810
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
The first total synthesis of the tetracyclic antimalarial Myrioneuron alkaloid (+/-)-myrioneurinol has been accomplished using three highly diastereoselective reactions as pivotal steps: 1) an intramolecular Michael addition of a benzyloxycarbonyl-protected lactam titanium enolate to an alpha,beta-unsaturated ester for construction of the spirocyclic C5 quaternary center and the a/d rings, 2) a malonate anion conjugate addition to a transient nitrosoalkene to install the requisite functionality and configuration at the C7 position, and 3) an intramolecular sulfonyliminium aza-Sakurai reaction to form the b ring and the attendant C9/C10 configuration of the natural product.
机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Zhang, Weiwei
Lin, Shanhao
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Lin, Shanhao
Du, Chenglong
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Du, Chenglong
Feng, Shangbiao
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Feng, Shangbiao
Liu, Zaimin
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Liu, Zaimin
Zhang, Jing
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Zhang, Jing
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机构:
Xie, Xingang
Wang, Xiaolei
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Wang, Xiaolei
Li, Huilin
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Li, Huilin
She, Xuegong
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机构:
Lanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R ChinaLanzhou Univ, Dept Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China