Diarylthiohydantoin Synthesis via Segmented Amide Coupling
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Solution Overview
Problem
Current methods for synthesizing compound (X) are inefficient and lack optimized processes for producing intermediates, which are crucial for its pharmacokinetic and pharmacodynamic performance in treating prostate cancer and other hyperproliferative diseases.
Innovation Solution
A process involving amide-bond formation, phosgene treatment, and copper-mediated reactions is developed to synthesize compound (X), including specific conditions such as temperature ranges, solvents, and catalysts to yield the desired compound effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current synthesis methods are used for compound (X), then the process is simpler, but the yield and purity are insufficient
Solution Approach 1:
The synthesis process is divided into multiple discrete steps with specific intermediates (compound I, compound II, compound III, compound IV) rather than attempting a single-step synthesis. Each step is optimized independently to achieve high overall yield and purity, resolving the contradiction between process complexity and manufacturing precision.
Solution Approach 2:
Protecting groups are introduced in preliminary steps to prevent unwanted side reactions during subsequent synthesis steps. This preliminary protection action ensures high purity of final product by preventing contamination from side reactions, justifying the increased process complexity.
2Reliability
If optimized intermediate production processes are implemented, then pharmacokinetic and pharmacodynamic performance improves, but production time increases
Solution Approach 1:
Specific temperature ranges (0°C to 50°C for amide bond formation, -20°C to 80°C for phosgene treatment) are optimized to balance reaction rate and product quality. These parameter optimizations ensure high pharmacokinetic and pharmacodynamic performance while minimizing unnecessary production time extensions.
Solution Approach 2:
The synthesis process is designed with continuous useful action through optimized reaction sequences where intermediates are carried forward without unnecessary isolation or purification steps that would waste time. Each step builds upon the previous one efficiently, maintaining productivity while ensuring quality.
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 process enhances the production of compound (X) by improving yield and purity, thereby increasing its pharmacokinetic and pharmacodynamic performance for treating prostate cancer and other diseases.
Implementation Method 1
reacting a compound of formula (XI-c), wherein P is a suitable amino protecting group, with compound (IV) under amide-bond formation conditions; in the presence of an amide coupling reagent
Implementation Method 2
reacting compound (IV) with phosgene or a phosgene analog; in the presence of an organic base; in an aprotic solvent; then treating a resulting isocyanate intermediate (IVa)
Implementation Method 3
reacting compound (XIII) with a compound of formula (2c-1) wherein X is chloro, bromo, or iodo and W is C 1-8 alkoxy or methylamino; in the presence of a Cu(0) source or a copper salt
Implementation Method 4
compound (XVII), wherein W is methylamino, is converted to compound (X), as shown in scheme (2e), by reacting compound (XVII) with a thiocarbonyl source; in the presence of an activating agent
Data Source
AI summary
Disclosed are processes to prepare intermediates for the preparation of compound (X), which is currently being investigated for the treatment of prostate cancer.