Functionalized Intermediates for Vitamin D Synthesis
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Solution Overview
Problem
Current methods for synthesizing vitamin D and its derivatives are inefficient, requiring multiple steps and low yields, with limited versatility in modifying substituents and stereochemistry, and existing synthetic routes are not adaptable for various applications.
Innovation Solution
Development of highly functionalized intermediates that allow for the preparation of vitamin D and its derivatives with a wide variety of substituents and stereochemistry configurations in few steps, including isotopic labeling, enabling efficient synthesis of vitamin D derivatives with specific functionalities at positions like C-25, C-18, and C-20, and unsaturation at C-16(17).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If classical linear synthesis pathway is used starting from steroid, then vitamin D derivatives can be obtained, but the number of synthesis steps increases and overall yield decreases
Solution Approach 1:
The synthesis pathway is divided into modular segments: a common Inhoffen-Lythgoe diol core structure that can be synthesized once, and various side-chain components that can be attached in subsequent steps. This segmentation allows different substituents to be introduced without re-synthesizing the entire molecule, reducing total steps and improving yield.
Solution Approach 2:
The Inhoffen-Lythgoe diol core structure is prepared in advance with pre-installed functional groups at key positions (C-1, C-3, C-10, C-13). This preliminary functionalization enables direct attachment of different side chains to create various vitamin D derivatives without requiring additional modification steps for each derivative.
2Manufacturing precision
If complete synthesis is performed for each vitamin D derivative, then specific substituents and stereochemistry can be achieved, but the number of steps increases and performance decreases
Solution Approach 1:
The Inhoffen-Lythgoe diol core is prepared with specific local functional groups at predetermined positions (hydroxyl groups at C-1 and C-3, ketone at C-10, carboxyl at C-13). This local quality control allows precise introduction of different substituents at specific positions while maintaining stereochemical integrity, without requiring complete re-synthesis for each derivative.
Solution Approach 2:
The Inhoffen-Lythgoe diol serves as a universal intermediate that can lead to multiple different vitamin D derivatives. The core structure possesses multiple reactive sites that can undergo different transformations, enabling one intermediate to produce numerous final products with different substituents and stereochemistries through a common pathway.
3Adaptability or versatility
If traditional synthesis methods are used, then vitamin D derivatives can be obtained, but versatility in modifying substituents and stereochemistry is limited
Solution Approach 1:
The synthetic route is designed to be dynamic and adaptable. The Inhoffen-Lythgoe diol intermediate can undergo various transformations depending on the desired final product. Different protecting group strategies, coupling reagents, and reaction conditions can be applied to the same core intermediate to achieve different substituents and stereochemistries, making the methodology flexible rather than rigid.
Data Source
AI summary
Versatile and functionalised intermediates for the synthesis of vitamin D and novel vitamin D derivatives. The invention provides novel intermediates for the complete synthesis of vitamin D and allows a great versatility of functional groups in the final vitamin derivatives. The invention also provides vitamin derivatives that are epimeric in position 3 and vitamin derivatives with a wide range of functionalities in position 18, including compounds with isotopic labeling