Alpha,beta-diamino acid derivative, synthetic method thereof and application thereof
A technology of two amino acids and synthetic methods, applied in the α field, can solve the problems of difficult large-scale industrial application, cumbersome operation and post-processing, and limited economic value, and achieve wide substrate applicability, high atom economy, and low cost Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0064] N-(4-bromobenzylidene)-4-chloroaniline (0.7mmol, 1.0eq), CbzNH 2 (1.4mmol, 2.0eq), rhodium acetate (0.007mmol) and Molecular sieves (0.2g) were dissolved in 1,2-dichloroethane (5.0ml) at room temperature, and then, dissolved in 1,2-dichloroethane (2.0ml) The ester (1.4mmol, 2.0eq) was added dropwise to the reaction system within 1 hour. After the dropwise addition was completed, it was stirred for 0.5 hour, and the solvent was removed by rotary evaporation under reduced pressure to obtain a crude product. The crude product was subjected to column chromatography (ethyl acetate:petroleum ether=1:50~1:20) to obtain the product (2S*, 3R*)-2-(benzyloxycarbonylamino)-3-(4-bromophenyl )-3-(4-Chloroanilino)-2-phenylpropanoic acid methyl ester, the yield is 72%, and the dr value is greater than 20:1. The structural formula of the product is shown in the following formula, and its NMR 1 H NMR, 13 C NMR spectrum see figure 1 .
[0065]
Embodiment 2
[0067] N-(4-bromobenzylidene)-4-chloroaniline (0.7mmol, 1.0eq), CbzNH 2 (1.4mmol, 2.0eq), rhodium propionate (0.007mmol) and Molecular sieves (0.2g) were dissolved in toluene (5.0ml) at room temperature, and then ethyl benzyldiazoacetate (1.4mmol, 2.0eq) dissolved in toluene (2.0ml) was added dropwise to In the reaction system, after the dropwise addition was completed, the mixture was stirred for 0.5 hour, and the solvent was removed by rotary evaporation under reduced pressure to obtain a crude product. The crude product was subjected to column chromatography (ethyl acetate:petroleum ether=1:50~1:20) to obtain the product (2S*, 3R*)-2-benzyl-2-(benzyloxycarbonylamino)-3-( 4-bromophenyl)-3-(4-chloroanilino)propionic acid methyl ester, the yield is 68%, and the dr value is greater than 20:1. The structural formula of the product is shown in the following formula, and its NMR 1 H NMR, 13 C NMR spectrum see figure 2 .
[0068]
Embodiment 3
[0070] N-benzylidene aniline (0.7mmol, 1.0eq), CbzNH 2 (1.4mmol, 2.0eq), rhodium butyrate (0.007mmol) and Molecular sieves (0.2g) were dissolved in dichloromethane (5.0ml) at room temperature, then methyl phenyldiazoacetate (1.4mmol, 2.0eq) dissolved in dichloromethane (2.0ml) was dissolved in 1 hour It was added dropwise to the reaction system, and after the dropwise addition was completed, it was stirred for 0.5 hours, and the solvent was removed by rotary evaporation under reduced pressure to obtain a crude product. The crude product was subjected to column chromatography (ethyl acetate:petroleum ether=1:50~1:20) to obtain the product (2S*,3R*)-2-(benzyloxycarbonylamino)-2,3-diphenyl- Methyl 3-(anilino)propionate with a yield of 50% and a dr value greater than 20:1. The structural formula of the product is shown in the following formula, and its NMR 1 H NMR, 13 C NMR spectrum see image 3 .
[0071]
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