## Abstract The preferred conformation of the C^α,α^‐diphenylglycine residue was determined in simple derivatives and dipeptides. The dipeptides were synthesized by the 5(4__H__)‐oxazolone (from the N‐__para__‐bromobenzoylated amino acid) method. This activated intermediate and a reaction by‐produc
Conformational effects of Cα,α-dipropargylglycine as a constrained residue
✍ Scribed by L. Damodharan; K. Mohanraja; S. Kotha; S. Durani; V. Pattabhi
- Book ID
- 101336527
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2001
- Tongue
- English
- Weight
- 161 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0006-3525
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✦ Synopsis
A useful synthon to approach artificial phenylalanyl peptides in a [2 ϩ 2 ϩ 2] cycloaddition reaction, C ␣,␣ -dipropargylglycine (Dprg) is examined for its conformational preferences as a constrained residue. Crystal structure analysis and preliminary NMR results establish possible preference of the residue for folded (␣) rather than extended () region of the ,
📜 SIMILAR VOLUMES
## Abstract The conformations of four BK antagonists, [D‐Arg^0^, Hyp^3^, Thi^5^, D‐Phe^7^, Acc^8^]BK (**1**), Aaa[D‐Arg^0^, Hyp^3^, Thi^5^, D‐Phe^7^, Acc^8^]BK (**2**), [D‐Arg^0^, Hyp^3^, Thi^5, 8^, Apc^7^]BK (**3**), and Aaa[D‐Arg^0^, Hyp^3^, Thi^5, 8^, Apc^7^]BK (**4**) were studied by using 2D N
## Abstract The conformational preference of C^α,α^‐diphenylglycinc (Døg) and C^α,α^‐dibenzylglycine (Dbz) residues was assessed in selected derivatives and small peptides by conformational energy computations, ir absorption, ^1^H‐nmr, and x‐ray diffraction. Conformational energy computations on th
Recent studies on the conformational preferences of the Dg (C ␣,␣ -diphenylglycine) residue showed that this C ␣,␣ -disubstituted glycine has a structural versatility. In fact, depending on the nature of the following or preceding residue, Dg can assume either folded or extended conformations. We ha
The molecular structures of four protected isovaline-(Iva-)containing peptides to the pentamer level have been determined by x-ray diffraction. The peptides are t-Boc-Ala-( S ) -1va-Ala-OMe ( t-Boc : tert-butyloxycarbonyl; OMe : methoxy) and its ( R ) -1va diastereomer, and t-Boc-[ Ala-( R ) -Iva],-