Preparation method of 2-((1S3aR7aR)-5-tert-butyloxycarbonyltetrahydrofuro[3,4]piperidine-1)acetic acid
A technology of tert-butoxycarbonyltetrahydrofuran and diisobutylaluminum hydride, which is applied in the field of 2-((1S3aR7aR)-5-tert-butoxycarbonyltetrahydrofuro[3,4]piperidine-1)acetic acid production method, capable of Solve the problems of no suitable industrial synthesis method, etc., and achieve the effect of reasonable reaction process design, strong repeatability and simple route
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0013] At zero degrees, SOCl 2 (400 mL) was slowly added dropwise into methanol (2.0 L). After the dropwise addition, the solution was stirred at room temperature for 15 minutes. Compound 1 (200 g, 1.2 mol) was added to the above solution in batches, and then 2, 2-Dimethoxypropane (400 mL). After the dropwise addition, the reaction solution was refluxed overnight. TLC (dichloromethane / methanol volume ratio 10:1) showed the reaction was complete. The reaction solution was concentrated under reduced pressure, ethyl acetate (2.0 L) was added to the residue, and the pH value was adjusted to 8 with dimethylamine. The mixture was washed with water three times, each time with 1.0 L of water, the separated organic phase was dried over anhydrous sodium sulfate and concentrated in vacuo, and the finally obtained residue was purified by silica gel column chromatography (gradient elution: petroleum ether / ethyl acetate volume ratio From 10 / 1 to 5 / 1 to 2 / 1) to obtain pure compound 2 as ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com