1,6-Diazabicyclo[6.2.0]decane Synthesis Through Chemoselective Bicyclization
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Solution Overview
Problem
Existing synthetic routes for producing 1,6-diazabicyclo[6.2.0]decane compounds, such as BRD7929, are lengthy, low-yielding, and costly, limiting their therapeutic potential for treating diseases like malaria and cryptosporidiosis.
Innovation Solution
A chemoselective tandem process involving reactions with chiral reagents and nucleophiles, including lithium diisopropyl amine and chiral sulfinyl imines, followed by lactone formation and bicyclization, to efficiently synthesize these compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing synthetic routes are used to produce 1,6-diazabicyclo[6.2.0]decane compounds, then the compounds can be synthesized, but the synthesis is lengthy, low-yielding, and costly
Solution Approach 1:
The synthesis is divided into distinct operational phases: (1) formation of the chiral sulfinyl imine intermediate, (2) conjugate addition of the nitrogen nucleophile, (3) lactone formation, and (4) bicyclization. This segmentation allows each step to be optimized independently and enables parallel processing of reagents and conditions, significantly reducing overall synthesis time and improving yield compared to sequential one-pot methods.
Solution Approach 2:
The chiral sulfinyl imine intermediate is prepared in advance with the correct stereochemistry already established. This preliminary preparation of the chiral intermediate allows the subsequent conjugate addition and bicyclization steps to proceed with high stereoselectivity and yield, avoiding the need for lengthy stereocontrol optimization in later steps.
2Productivity
If existing synthetic routes are used, then the compounds can be produced, but the yield is low
Solution Approach 1:
The reaction conditions are optimized by changing key parameters: using chiral sulfinyl imines with specific steric bulk, adjusting the nucleophilicity of the nitrogen source, controlling the lactone formation pH and temperature, and optimizing the bicyclization step conditions. These parameter changes result in high yielding reactions with minimal material loss and improved atom economy throughout the synthesis sequence.
3Ease of manufacture
If existing synthetic routes are used, then the compounds can be synthesized, but the cost is high
Solution Approach 1:
Multiple transformations are merged into a single operational sequence: the conjugate addition, lactone formation, and bicyclization steps are combined in a streamlined protocol that uses the same chiral sulfinyl imine intermediate for all transformations. This merging reduces the number of separate operations, reagents, and purification steps required, thereby lowering overall production cost while maintaining high yield and stereochemical integrity.
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
The method provides a more efficient and cost-effective synthesis of 1,6-diazabicyclo[6.2.0]decane compounds, enabling further medicinal chemistry exploration and widespread delivery of antimalarial therapeutics.
Implementation Method 1
reacting a reactant of Formula II with a base and resolving the racemic mixture by crystallization with a chiral reagent
Implementation Method 2
resolving the racemic mixture by crystallization with a chiral reagent
Implementation Method 3
converting the alcoholic groups covalently attached to the unsaturated carbons of Formula VI into leaving groups to form an intermediate that reacts with a nitrogen nucleophile to generate a compound of Formula IV
Implementation Method 4
effecting bicyclization
Data Source
AI summary
A method for the synthesis of diazabicyclo[6.2.0]decane compounds is provided. The synthesis proceeds by stereoselective synthesis of a chiral lactone followed by azetidine formation via a series of chemoselective reactions. Bicyclization results with the formation of diazobicyclo[6.2.0]decane related compounds.