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Shinotsuka Y, Nakajima R, Ogawa K, Takise K, Takeuchi Y, Tanaka H, Sasaki K. Stereoselective synthesis of D- glycero-D- manno-heptose-1β,7-bisphosphate (HBP) from D-mannurono-2,6-lactone. Org Biomol Chem 2024; 22:2544-2548. [PMID: 38414338 DOI: 10.1039/d4ob00139g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The synthesis of D-glycero-D-manno-heptose-1β,7-bisphosphate (HBP) from D-mannose is described. This synthetic approach is notable for the elongation of the seventh carbon, employing mannurono-2,6-lactone, the substrate-controlled establishment of the C-6 configuration, and the nucleophilic introduction of phosphate at the C-1 position through the utilization of 4,6-O-benzylidene-α-triflate.
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Affiliation(s)
- Yuta Shinotsuka
- Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan.
| | - Riko Nakajima
- Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan.
| | - Kohei Ogawa
- Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan.
| | - Kaede Takise
- Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan.
| | - Yutaka Takeuchi
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1-H101, Ookayama, Muguro-ku, Tokyo 152-8552, Japan
| | - Hiroshi Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1-H101, Ookayama, Muguro-ku, Tokyo 152-8552, Japan
| | - Kaname Sasaki
- Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan.
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Synthetic Optimizations for Gram-Scale Preparation of 1-O-Methyl d-Glycero-α-d-gluco-heptoside 7-Phosphate from d-Glucose. Molecules 2022; 27:molecules27217534. [PMID: 36364355 PMCID: PMC9654166 DOI: 10.3390/molecules27217534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 10/26/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022] Open
Abstract
Heptose phosphates—unique linkers between endotoxic lipid A and O-antigen in the bacterial membrane—are pathogen-associated molecular patterns recognized by the receptors of the innate immune system. Understanding the mechanisms of immune system activation is important for the development of therapeutic agents to combat infectious diseases and overcome antibiotic resistance. However, in practice, it is difficult to obtain a substantial amount of heptose phosphates for biological studies due to the narrow scope of the reported synthetic procedures. We have optimized and developed an inexpensive and convenient synthesis for the first performed gram-scale production of 1-O-methyl d-glycero-α-d-gluco-heptoside 7-phosphate from readily available d-glucose. Scaling up to such amounts of the product, we have increased the efficiency of the synthesis and reduced the number of steps of the classical route through the direct phosphorylation of the O6,O7-unprotected heptose. The refined method could be of practical value for further biological screening of heptose phosphate derivatives.
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