Lifitegrast Synthesis via Direct Coupling Without Protection Steps

Solution Overview

Problem

Current processes for preparing lifitegrast, a drug for dry eye syndrome, are inefficient and require multiple protection and deprotection steps, increasing time and resource consumption.

Innovation Solution

A process involving contacting specific compounds with activating reagents in solvents to form activated intermediates, which are then coupled to produce lifitegrast without the need for protection or deprotection steps, reducing the total number of synthetic steps and simplifying the production process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional multi-step synthesis process with protection and deprotection steps is used, then product purity can be maintained, but production time and resource consumption increase significantly

Engineering Contradiction:

Improveproduction efficiencyVSAvoidsynthesis time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The invention extracts and removes the unnecessary protection and deprotection steps from the traditional synthesis pathway. By designing a route that directly couples the isoquinoline carboxylic acid with the amino acid derivative without requiring protective groups, the process eliminates redundant operations while maintaining product purity, thereby reducing both time and resource consumption.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention applies preliminary action by pre-designing the synthesis route to avoid the need for protection groups in the first place. The coupling reaction is planned and executed in a way that directly forms the desired amide bond without requiring prior protection of functional groups, thus eliminating subsequent deprotection steps and streamlining the entire process.

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If traditional synthesis process with multiple protection and deprotection steps is used, then selective reactions can be achieved, but process complexity increases

Engineering Contradiction:

Improveprocess simplicityVSAvoidnumber of synthetic steps

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The invention extracts and removes the unnecessary protection and deprotection steps from the traditional synthesis pathway. By designing a route that directly couples the isoquinoline carboxylic acid with the amino acid derivative without requiring protective groups, the process eliminates redundant operations while maintaining product purity, thereby reducing both time and resource consumption.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention merges the coupling reaction steps into a single direct transformation. Instead of separating protection, coupling, and deprotection into distinct sequential steps, the process combines these operations into one efficient coupling reaction that directly yields the final product, thereby reducing the total number of steps and simplifying the manufacturing process.

Inventive Principle:

Principle #5Merging (Combining)

3Manufacturing precision

If traditional synthesis route is used, then product quality can be ensured, but resource consumption and cost increase

Engineering Contradiction:

Improveproduct qualityVSAvoidresource consumption

Core Design Contradiction:

Manufacturing precisionVSLoss of substance

Solution Approach 1:

The invention extracts and removes the unnecessary protection and deprotection steps from the traditional synthesis pathway. By designing a route that directly couples the isoquinoline carboxylic acid with the amino acid derivative without requiring protective groups, the process eliminates redundant operations while maintaining product purity, thereby reducing both time and resource consumption.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention applies parameter changes by optimizing the coupling reaction conditions to achieve high product quality directly without requiring protection groups. By adjusting parameters such as solvent selection, coupling reagents, and reaction temperature, the process maintains manufacturing precision while eliminating the need for additional steps that would consume extra resources and materials.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach significantly reduces the time and resources required for lifitegrast production by eliminating unnecessary processing steps, leading to a more efficient synthesis method.

Implementation Method 1

contacting the compound of Formula IV with an activating reagent in an activating solvent to provide an activated intermediate of Formula IVa

Methodology Applied

Scientific EffectChemical activation: Chemical Bonding

Implementation Method 2

contacting the activated intermediate of Formula IVa with a compound of Formula V or V' in a coupling solvent to provide a compound of Formula I

Methodology Applied

Scientific EffectCoupling reaction: Chemical Bonding

Data Source

PatentEP3645529B1Process for preparing lifitegrast and intermediates thereof

Publication Date: 2023.11.22 SCINOPHARM TAIWAN LTD

AI summary

The present disclosure provides efficient, economical, and improved processes for synthesizing lifitegrast and intermediates thereof. The currently discloses processes provide a direct synthetic route, avoiding protection or deprotection steps. The currently disclosed process also provides processes for synthesizing lifitegrast using a reduced number of synthetic steps.