Trityl Protecting Agent Solubility Peptide Synthesis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional protecting groups for functional groups like carboxy, hydroxy, amino, and mercapto groups lead to insolubility in organic solvents, making separation and purification of compounds difficult, especially in peptide synthesis.
Innovation Solution
Development of a trityl compound with a substituted silyloxy group through an oxyalkylene group on a benzene ring, which acts as a protecting agent, enhancing solubility and preventing precipitation in organic solvents, facilitating liquid-liquid phase separation and easy purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional protecting groups (benzyl ester, tert-butyl ester) are used for carboxy groups, then protection can be achieved by simple and convenient methods, but the compounds are easily precipitated out and become insoluble in organic solvents
Solution Approach 1:
The patent modifies the molecular structure of the protecting group by introducing a fluorinated alkyl chain with specific parameters (chain length, fluorine substitution pattern) to change the solubility characteristics of the protected compound while maintaining the protection function
Solution Approach 2:
The protecting group combines multiple functional elements: the trityl core structure for protection, fluorinated alkyl chains for solubility enhancement, and specific substituent patterns to achieve both protection and solubility simultaneously
2Reliability
If conventional protecting groups are used, then protection is achieved, but separation and purification of compounds after reaction become difficult due to precipitation and insolubility
Solution Approach 1:
By changing the solubility parameters of the protecting group through fluorinated chain introduction, the compound remains soluble during reactions, enabling easy separation and purification by conventional techniques while maintaining reliable protection
3Productivity
If compounds with conventional protecting groups are used in peptide synthesis, then condensation reactions can be performed, but the compounds become insoluble even in organic solvents making sequential reactions difficult
Solution Approach 1:
The fluorinated alkyl chain with specific parameters (carbon chain length, fluorine substitution) is introduced to change the solubility profile, allowing peptide intermediates to remain soluble throughout sequential condensation reactions
Data Source
AI summary
The invention is to develop a protecting group that does not solidify or insolubilize a compound in which a functional group has been protected, and facilitates separation and purification after a reaction. Disclosed is a trityl compound represented by General Formula (1): wherein Y represents a hydroxy group or a halogen atom; at least one of R1 to R15 represents a group represented by Formula (2) : -O-R16-X-A (2) while the other groups each represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms; R16 represents a linear or branched alkylene group having 1 to 16 carbon atoms; X represents O or CONR17 (here, R17 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms); and A represents a group represented by, for example, Formula (3) : wherein R18, R19, and R20, which may be identical or different, each represent a linear or branched alkyl group having 1 to 6 carbon atoms, or an aryl group which may have a substituent.