The one-pot syntheses of N-protected Δ1- and Δ2-dehydrodipeptide esters by the coupling of N-carboxy α-dehydroamino acid anhydride (ΔNCA) with several kinds of C- or N-protected L-α-amino acids are described. In addition, it was found that a similar coupling of ΔNCA with both C- and N-protected α-amino acids also took place to give Δ2-dehydrotripeptide derivatives, involving eight kinds of important
New endomorphin-2 (EM-2) analogues incorporating (Z)-α,β-didehydrophenylalanine (ΔZPhe) in place of the native phenylalanine in EM-2 are reported. Tyr-Pro-ΔZPhe-Phe-NH2 [ΔZPhe3]EM-2} (1), Tyr-Pro-Phe-ΔZPhe-NH2 [ΔZPhe4]EM-2} (2), and Tyr-Pro-ΔZPhe-ΔZPhe-NH2 [ΔZPhe3,4]EM-2}(3) have been synthesized, their opioid receptor binding affinities and tissue bioassay activities were determined, and their
新的内吗啡肽-2 (EM-2) 类似物包含 ( Z )-α,β-二脱氢苯丙氨酸( ΔZ Phe) 代替 EM-2 中的天然苯丙氨酸。Tyr-Pro-Δ Z Phe-Phe-NH 2 [Δ Z Phe 3 ]EM-2} ( 1 )、Tyr-Pro-Phe-Δ Z Phe-NH 2 [Δ Z Phe 4 ]EM-2} ( 2 ) 和 Tyr-Pro-Δ Z Phe-Δ Z Phe-NH 2 [Δ Z Phe 3,4 ]EM-2}( 3) 已经合成,它们的阿片受体结合亲和力和组织生物测定活性被确定,并且它们的构象特性被检查。化合物2显示出与天然肽相当的高 μ 阿片受体选择性和 μ 激动剂活性。报道了N -Boc-Tyr-Pro- ΔZ Phe-Phe-NH 2 ( 8 )在溶液和晶体中采用的构象。
Pd(0)‐Catalyzed Heck‐Type Arylation of Didehydropeptides
作者:Shital K. Chattopadhyay、Benoy K. Pal、Suman Biswas
DOI:10.1081/scc-200054757
日期:2005.5
Pd(0)-catalyzed Heck-type arylation of several didehydropeptides has been studied and the process has been found to be a viable method for the synthesis of the corresponding arylated products stereoselectively but in moderate yields.
Kubica, Z.; Rzeszotarska, B.; Smelka, L., Polish Journal of Chemistry, 1992, vol. 66, # 8, p. 1263 - 1268
作者:Kubica, Z.、Rzeszotarska, B.、Smelka, L.
DOI:——
日期:——
Synthesis and electrochemical behaviour of β-halodehydroamino acid derivatives
作者:Paula M. T. Ferreira、L. S. Monteiro、G. Pereira
DOI:10.1007/s00726-009-0466-x
日期:2010.7
conclude that when N-iodosuccinimide was used as reagent a much higher Z-stereoselectivity is found. The electrochemicalbehaviour of the halogenated dehydroamino acids was studied by cyclic voltammetry. The results show a shift in the reduction peak to higher potentials of the β-halogenated dehydroamino acids when compared with the corresponding non-halogenated derivatives. As expected, the β,β-dihalodehydroalanines