|
1
|
Li W, Jiang M, Chen W, Chen Y, Yang Z, Tang P, Chen F. Total Synthesis of (-)-Canadine, (-)-Rotundine, (-)-Sinactine, and (-)-Xylopinine Using a Last-Step Enantioselective Ir-Catalyzed Hydrogenation. J Org Chem 2021; 86:8143-8153. [PMID: 34076443 DOI: 10.1021/acs.joc.1c00602] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise asymmetric total synthesis of a group of tetrahydroprotoberberine alkaloids, (-)-canadine, (-)-rotundine, (-)-sinactine, and (-)-xylopinine, has been accomplished in three steps from the commercially available corresponding disubstituted phenylethylamine and disubstituted benzaldehyde. Our synthesis toward these four alkaloids took advantage of the following strategy: in the first step, we achieved an efficient and sustainable synthesis of secondary amine hydrochlorides via a fully continuous flow; in the second step, we developed a Pictet-Spengler reaction/Friedel-Crafts hydroxyalkylation/dehydration cascade for the construction of the dihydroprotoberberine core structure (ABCD-ring); and in the last step, Ir-catalyzed enantioselective hydrogenation was employed for the introduction of the desired stereochemistry at the C-14 position in the tetrahydroprotoberberine alkaloids. This work significantly expedites the asymmetric synthesis of the entire tetrahydroprotoberberine alkaloid family as well as a more diverse set of structurally related non-natural analogues.
Collapse
Affiliation(s)
- Weijian Li
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Meifen Jiang
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Wenchang Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yu Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Zhi Yang
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Pei Tang
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Fener Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.,Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China.,Shanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs, Shanghai 200433, China
| |
Collapse
|
|
2
|
Miyazawa M, Tokuhashi T, Horibata A, Nakamura T, Onozaki Y, Kurono N, Senboku H, Tokuda M, Ohkuma T, Orito K. Synthesis of 8-Oxoberbines and Related Benzolactams by Pd(OAc)2-Catalyzed Direct Aromatic Carbonylation. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Mamoru Miyazawa
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Takashi Tokuhashi
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Akiyoshi Horibata
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Takatoshi Nakamura
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Yu Onozaki
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Nobuhito Kurono
- Laboratory of Organic Synthesis, Division of Chemical Process Engineering, Faculty of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Hisanori Senboku
- Laboratory of Organic Reaction, Division of Chemical Process Engineering, Faculty of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Masao Tokuda
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Takeshi Ohkuma
- Laboratory of Organic Synthesis, Division of Chemical Process Engineering, Faculty of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| | - Kazuhiko Orito
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering; Hokkaido University; Sapporo 060-8628; Japan
| |
Collapse
|
|
3
|
Li H, Miyahara T, Tezuka Y, Tran QL, Seto H, Kadota S. Effect of berberine on bone mineral density in SAMP6 as a senile osteoporosis model. Biol Pharm Bull 2003; 26:110-1. [PMID: 12520186 DOI: 10.1248/bpb.26.110] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of berberine in senescence accelerated mice P6 (SAMP6) were investigated to learn whether the alkaloid affects bone mineral density (BMD). Oral administration of berberine (10 mg/kg/d) to male and female mice for 22 weeks resulted in an increase in BMD in both sexes. A decreased concentration of deoxypyridinoline (Dpd) in urine was only observed in female mice. There was no effect on body or tibia weight or on the concentration of procollagen type I carboxyterminal extension peptide (PICP) in serum.
Collapse
Affiliation(s)
- Huiying Li
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, 2630 Sugitami, Toyama 930-0194, Japan
| | | | | | | | | | | |
Collapse
|
|
4
|
Cutter PS, Miller R, Schore NE. Synthesis of protoberberines using a silyl-directed Pictet–Spengler cyclization. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00010-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
|
5
|
|