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2,2-Bis(ethoxycarbonyl)vinyl (BECV) as a versatile amine protecting group for selective functional-group
Andivelu Ilangovan1, Rajendran Ganesh Kumar
1School of Chemistry, Bharathidasan University, Palkalaiperur, Tiruchirappalli-620 024, Tamil Nadu, India. ilangovanbdu@yahoo.com
Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 16, 2010
Summary
The 2,2-Bis(ethoxycarbonyl) vinyl (BECV) group selectively protects amines at room temperature. This BECV protecting group is stable during various chemical transformations and easily removed without affecting other functional groups.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
- Protecting Group Chemistry
Background:
- Selective amine protection is crucial in complex molecule synthesis.
- Existing protecting groups may lack stability or require harsh deprotection conditions.
- Orthogonal protecting group strategies are essential for multi-step synthesis.
Purpose of the Study:
- To introduce and evaluate the 2,2-Bis(ethoxycarbonyl) vinyl (BECV) group as a novel amine protecting group.
- To demonstrate the selective protection and deprotection capabilities of the BECV group.
- To assess the stability of the BECV group under various reaction conditions and its orthogonality with other protecting groups.
Main Methods:
- Amine protection using the BECV reagent at room temperature.
- Performing various functional group transformations (esterification, alkylation, acylation) in the presence of the BECV-protected amine.
- Selective deprotection of the BECV group using ethylenediamine.
- Assessing the stability of the BECV group against common protecting groups (Fmoc, Cbz, Boc).
Main Results:
- The BECV group selectively protected amines in the presence of hydroxyl, thiol, carboxyl, and other amine groups.
- Functional group transformations like esterification, O-alkylation, O-acylation, N-alkylation, N-acylation, and S-alkylation were successfully performed with the BECV group intact.
- Selective and rapid deprotection of the BECV group was achieved using ethylenediamine at room temperature.
- The BECV group demonstrated orthogonal stability against Fmoc, Cbz, and Boc protecting groups, with other functional groups like esters, amides, and ethers remaining unaffected.
Conclusions:
- The 2,2-Bis(ethoxycarbonyl) vinyl (BECV) group is an effective reagent for the selective protection of amines.
- The BECV group offers excellent stability during diverse synthetic transformations and orthogonal compatibility with common protecting groups.
- The mild and selective deprotection conditions make the BECV group a valuable tool in complex organic synthesis.
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